Epigenase™ 5-mC Hydroxylase TET Activity/Inhibition

EPIGENTEK
Complete Solutions for Epigenetics
Epigenase™ LSD1 Demethylase
Activity/Inhibition Assay Kit
(Colorimetric)
Base Catalog # P-3078
PLEASE READ THIS ENTIRE USER GUIDE BEFORE USE
Uses: The Epigenase™ LSD1 Demethylase Activity/Inhibition Assay Kit (Colorimetric) is suitable for
measuring LSD1 activity/inhibition using nuclear extracts or purified enzymes from a broad range of
species such as mammals, plants, fungi, and bacteria, in a variety of forms including cultured cells and
fresh tissues. Nuclear extracts can be prepared by using your own successful method. For your
convenience and the best results, Epigentek offers a nuclear extraction kit (Cat. No. OP-0002) that is
optimized for use with this kit. Nuclear extracts can be used immediately or stored at –80°C for future
use. Purified enzymes can be active LSD1 from recombinant proteins or isolated from cell/tissues.
Input Material: Input materials can be nuclear extracts or purified LSD1 enzymes. The amount of
nuclear extracts for each assay can be 0.5 µg to 20 µg with an optimal range of 5-10 µg. The amount
of purified enzymes can be 5 ng to 500 ng, depending on the purity and catalytic activity of the
enzymes.
Internal Control: The LSD1 assay standard (demethylated hsitone H3-K4) is provided in this kit for
quantification of LSD1 enzyme activity. Because LSD1 activity can vary from tissue to tissue, and from
normal and diseased states, it is advised to run replicate samples to ensure that the signal generated
is validated.
Precautions: To avoid cross-contamination, carefully pipette the sample or solution into the strip
wells. Use aerosol-barrier pipette tips and always change pipette tips between liquid transfers. Wear
gloves throughout the entire procedure. In case of contact between gloves and sample, change gloves
immediately.
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P-3078
EPIGENTEK
Complete Solutions for Epigenetics
KIT CONTENTS
Component
48 Assays
Cat. #P-3078-48
96 Assays
Cat. #P-3078-96
Storage
Upon Receipt
LD1 (10X Wash Buffer)
14 ml
28 ml
4°C
LD2 (LSD1 Assay Buffer)
4 ml
8 ml
RT
LD3 (LSD1 Substrate, 50 µg/ml)*
60 µl
120 µl
–20°C
LD4 (LSD1 Assay Standard, 50 µg/ml)*
10 µl
20 µl
–20°C
LD5 (Capture Antibody, 1000 µg/ml*)
5 µl
10 µl
4°C
LD6 (Detection Antibody, 400 µg/ml)*
6 µl
12 µl
–20°C
LD7 (LSD1 Inhibitor Tranylcypromine, 1 mM)*
20 µl
40 µl
4°C
LD8 (Developer Solution)
5 ml
10 ml
4°C
LD9 (Stop Solution)
5 ml
10 ml
RT
8-Well Assay Strips (With Frame)
6
12
4°C
Adhesive Covering Film
1
1
RT
User Guide
1
1
RT
* Spin the solution down to the bottom prior to use.
SHIPPING & STORAGE
The kit is shipped in two parts: the first part at ambient room temperature and the second part on
frozen ice packs at 4°C.
Upon receipt: (1) Store LD3, LD4, and LD6 at –20°C away from light; (2) Store LD1, LD5, LD7, LD8,
and 8-Well Assay Strips at 4°C away from light; (3) Store remaining components (LD2, LD9, and
Adhesive Covering Film) at room temperature away from light.
All components of the kit are stable for 6 months from the date of shipment, when stored properly.
Note: (1) Check if LD1 (10X Wash Buffer) contains salt precipitates before use. If so, warm (at room
temperature or 37°C) and shake the buffer until the salts are re-dissolved; and (2) check if a blue color
is present in LD8 (Developer Solution), which would indicate contamination of the solution and should
not be used. To avoid contamination, transfer the amount of LD8 required into a secondary container
(tube or vial) before adding LD8 into the assay wells.
MATERIALS REQUIRED BUT NOT SUPPLIED

Adjustable pipette or multiple-channel pipette

Multiple-channel pipette reservoirs

Aerosol resistant pipette tips

Microplate reader capable of reading absorbance at 450 nm

1.5 ml microcentrifuge tubes
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P-3078
EPIGENTEK
Complete Solutions for Epigenetics

Incubator for 37°C incubation

Distilled water

Nuclear extract or purified enzymes

Parafilm M or aluminum foil
GENERAL PRODUCT INFORMATION
Quality Control: Each lot of the Epigenase™ LSD1 Demethylase Activity/Inhibition Assay Kit
(Colorimetric) is tested against predetermined specifications to ensure consistent product quality.
Epigentek guarantees the performance of all products in the manner described in our product
instructions.
Product Warranty: If this product does not meet your expectations, simply contact our technical
support unit or your regional distributor. We also encourage you to contact us if you have any
suggestions about product performance or new applications and techniques.
Safety: Suitable lab coat, disposable gloves, and proper eye protection are required when working
with this product.
Product Updates: Epigentek reserves the right to change or modify any product to enhance its
performance and design. The information in this User Guide is subject to change at any time without
notice. Thus, only use the User Guide that was supplied with the kit when using that kit.
Usage Limitation: The Epigenase™ LSD1 Demethylase Activity/Inhibition Assay Kit (Colorimetric) is
for research use only and is not intended for diagnostic or therapeutic application.
Intellectual Property: The Epigenase™ LSD1 Demethylase Activity/Inhibition Assay Kit (Colorimetric)
and methods of use contain proprietary technologies by Epigentek.
A BRIEF OVERVIEW
Lysine histone methylation is one of the most robust epigenetic marks and is essential for the
regulation of multiple cellular processes. The methylation of H3-K4 seems to be of particular
significance, as it is associated with active regions of the genome. H3-K4 methylation was considered
irreversible until the identification of a large number of histone demethylases indicated that
demethylation events play an important role in histone modification dynamics. So far at least 2 classes
of H3-K4 specific histone demethylase, LSD1 (BHC110, KDM1) and JARIDs have been identified.
LSD1 can remove di- and mono-methylation from H3-K4 by using an amine oxidase reaction. LSD1 is
associated with complexes that function as both transcriptional inactivators and activators. It
demethylates mono-/di-methyl H3-K4 when associated with the Co-REST complex at neuronal genes,
or mono-/di-methyl H3-K9 when associated with the androgen receptor.
Fig 1. Histone H3-K4 demethylation reaction catalyzed by LSD1
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EPIGENTEK
Complete Solutions for Epigenetics
LSD1 is found to be pivotal in development and differentiation. For example, this enzyme is required to
induce skeletal muscle differentiation, and mutation of drosophila LSD1 results in tissue-specific defect
in development through disrupting H3-K4 methylation. LSD1 is also shown to participate in regulation
of chromatin remodeling, cell death and global DNA methylation. More importantly, LSD1 is found to
be involved in some pathological processes such as cancer and inflammatory diseases. For example,
expression of LSD1 is observed in cancer and LSD1 triggers MYC and E2F-mediated transcription in
cancer cells. Detection of activity and inhibition of LSD1 would be important in elucidating mechanisms
of epigenetic regulation of gene activation and silencing and benefiting cancer diagnostics and
therapeutics.
There are only a couple of methods used for detecting LSD1 activity/inhibition. These methods are
based on the measurement of H2O2 or formaldehyde release, a by-product of LSD1 enzymatic reaction
and have significant weaknesses including: (1) Large amount (at µg: level) of substrate and enzyme
are required; (2) Nuclear extracts from cell/tissues can not be used; (3) Redox-sensitive LSD1
inhibitiors are not suitable for testing with these methods; (4) Highly interfered by DMSO and thiolcontaining chemicals, which are often contained in enzyme solution or tested compound solvents; and
(5) Less accuracy than direct measurement of LSD1-converted demethylated product. These problems
were averted with the earlier EpiQuik™ Histone Demethylase LSD1 Activity/Inhibition Assay Kit, a
popular assay method for LSD1 activity/inhibition. We have now added an improved version, the
Epigenase™ LSD1 Activity/Inhibition Assay Kit (Colorimetric). This latest method retains the simplicity,
rapidness, high throughput, and non-radioactivity featured in the previous version, and has the
following advantages:






Strip-well microplate format makes the assay flexible and quick: manual or high throughput
analysis that can be completed within 3 hours.
Enhanced kit composition enables background signals to be extremely low, which allows the
assay to be more accurate, sensitive, reliable, and consistent.
Innovative colorimetric assay directly measures LSD1 activity by a straightforward detection of
LSD1-converted demethylated product, rather than by-products. Thus it eliminates assay
interferences caused by thiol-containing chemicals such as DTT, GSH, and 2-mercaptoethanol.
Both cell/tissue extracts and purified LSD1 can be used, which allows for the detection of inhibitory
effects of LSD1 inhibitor in vivo and in vitro.
Novel assay principle allows high sensitivity to be achieved. The activity can be detected from as
low as 5 ng of purified LSD1 enzyme, which is about 20 fold higher than that obtained by
H2O2/formaldehyde release-based LSD1 assays.
Demethylated H3-K4 standard is included, which allows the specific activity of LSD1 to be
quantified.
PRINCIPLE & PROCEDURE
The Epigenase™ LSD1 Demethylase Activity/Inhibition Assay Kit (Colorimetric) contains all reagents
necessary for the measurement of LSD1 activity/inhibition. In this assay, di-methylated histone H3-K4
LSD1 substrate is stably coated onto the strip wells. Active LSD1 binds to the substrate and removes
methyl groups from the substrate. The LSD1-demethylated products can be recognized with a specific
antibody. The ratio or amount of demethylated products, which is proportional to enzyme activity, can
then be colorimetrically measured by reading the absorbance in a colorimetric microplate reader at a
wavelength of 450 nm. The activity of LSD1 enzyme is proportional to the optical density intensity
measured.
110 Bi County Blvd. Ste. 122, Farmingdale, NY 11735
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EPIGENTEK
Complete Solutions for Epigenetics
1.2
2
R = 0.9986
1
OD450 nm
0.8
0.6
0.4
0.2
0
0
50
100
150
200
250
LSD1 (ng)
Demonstration of high sensitivity of LSD1 activity assay achieved
by using recombinant LSD1 with EpigenaseTM LSD1
Activity/Inhibition Assay Ultra Kit
100
90
80
Schematic procedure of EpigenaseTM LSD1 Demethylase
Activity/Inhibition Assay Kit (Colorimetric).
%Inhibition
70
60
50
40
30
20
10
0
0
10
20
50
100
200
500
Tranylcypromine (uM)
Demonstration of inhibitory effect of LSD1 inhibitor
detected by EpigenaseTM LSD1 Activity/Inhibition Assay
Ultra Kit. LSD1 concentration: 200 ng/well.
PROTOCOL
For the best results, please read the protocol in its entirety prior to starting your experiment.
Starting Materials
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EPIGENTEK
Complete Solutions for Epigenetics
Input Amount: The amount of nuclear extracts for each assay can be 0.5 µg to 20 ug with optimized range
of 5-10 µg. The amount of purified enzymes can be 5 ng to 500 ng, depending on the purity and catalatic
activity of the enzymes.
Nuclear Extraction: You can use your method of choice for preparing nuclear extracts. Epigentek also
offers a nuclear extraction kit (Cat. No. OP-0002) optimized for use with this kit.
Nuclear Extract or Purified LSD1 Storage: Nuclear extract or purified LSD1 enzyme should be stored in
aliquots at –80°C until use.
1. Working Buffer and Solution Preparation
a.
Prepare Diluted LD1 1X Wash Buffer:
48-Assay Kit: Add 13 ml of LD1 10X Wash Buffer to 117 ml of distilled water and adjust pH to 7.2-7.5.
96-Assay Kit: Add 26 ml of LD1 10X Wash Buffer to 234 ml of distilled water and adjust pH to 7.2-7.5.
This Diluted LD1 1X Wash Buffer can now be stored at 4°C for up to six months.
b.
Prepare Diluted LD5 Capture Antibody Solution:
Dilute LD5 Capture Antibody with Diluted LD1 1X Wash Buffer at a ratio of 1:1000 (add 1 µl of LD5 to
1000 µl of Diluted LD1 1X Wash Buffer). 50 µl of Diluted LD5 will be required for each assay well.
c.
Prepare Diluted LD6 Detection Antibody Solution:
Dilute LD6 Detection Antibody with Diluted LD1 1X Wash Buffer at a ratio of 1:2000 (add 1 µl of LD6
Detection Antibody to 2000 µl of Diluted LD1 1X Wash Buffer). 50 µl of Diluted LD6 will be required
for each assay well.
d.
Prepare Diluted LD4 Standard Solution:
Suggested Standard Curve Preparation: First, dilute LD4 with LD2 to 5 ng/µl by adding 1 µl of LD4 to
9 µl of LD2. Then, further prepare five concentrations by combining the 5 ng/µl diluted LD4 with LD2
into final concentrations of 0.2, 0.5, 1, 2, and 5 ng/µl according to the following dilution chart:
LD2
Resulting LD4
Concentration
Tube
LD4 (5 ng/µl)
1
1.0 µl
24.0 µl
0.2 ng/µl
2
1.0 µl
9.0 µl
0.5 ng/µl
3
1.0 µl
4.0 µl
1.0 ng/µl
4
2.0 µl
3.0 µl
2.0 ng/µl
5
4.0 µl
0.0 µl
5.0 ng/µl
Note: Keep each of diluted solutions except Diluted LD1 1X Wash Buffer on ice until use. Any
remaining diluted solutions other than Diluted LD1 should be discarded if not used within the same
day.
2. Enzymatic Reaction
a.
Predetermine the number of strip wells required for your experiment. It is advised to run replicate
samples (include blank and positive control) to ensure that the signal generated is validated. Carefully
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Complete Solutions for Epigenetics
remove un-needed strip wells from the plate frame and place them back in the bag (seal the bag tightly
and store at 4°C).
b.
Blank Wells: Add 49 µl of LD2 and 1 µl of LD3 to each blank well.
c.
Standard Wells: For a standard curve, add 49 µl of LD2 and 1 µl of Diluted LD4 standard solution to
each standard well with a minimum of five wells, each at a different concentration between 0.2 to 5
ng/µl (based on the dilution chart in Step 1d; see Table 3 as an example).
d.
Sample Wells Without Inhibitor: Add 45 to 48 µl of LD2, 1 µl of LD3, and 1 to 4 µl of your nuclear
extracts or 1 to 4 µl of your purified LSD1 enzyme to each sample well without inhibitor. Total volume
should be 50 µl per well.
e.
Sample Well With Inhibitor: Add 40 to 43 µl of LD2, 1 µl of LD3, 1 to 4 µl of your nuclear extracts or 1
to 4 µl of your purified LSD1 enzyme, and 5 µl of inhibitor solution. Total volume should be 50 µl per
well.
Note: (1) Follow the suggested well setup diagrams; (2) It is recommended to use 2 µg to 10 µg of
nuclear extract per well or 10 ng to 100 ng of purified enzyme per well; (3) The concentration of
inhibitors to be added into the sample wells can be varied (e.g., 1 µM to 1000 µM). However, the final
concentration of the inhibitors before adding to the wells should be prepared with LD2 at a 1:10 ratio
(e.g., add 0.5 µl of inhibitor to 4.5 µl of LD2), so that the original solvent of the inhibitor can be reduced
to 1% of the reaction solution or less. The LSD1 inhibitor, Tranylcypromine (LD7) included in the kit
can be used as a control inhibitor.
f.
Tightly cover strip-well microplate with Adhesive Covering Film to avoid evaporation and incubate at
37°C for 60-120 min.
Note: (1) The incubation time may depend on intrinsic LSD1 activity. However, in general, 60-90 min
incubation is suitable for active purified LSD1 enzymes and 90-120 min incubation is required for
nuclear extracts; (2) The Adhesive Covering Film can be cut to the required size to cover the strips
based on the number of strips to be used.
g.
Remove the reaction solution from each well. Wash each well with 150 µl of the Diluted LD1 1X Wash
Buffer each time for three times.
3. Antibody Binding & Signal Enhancing
a.
Add 50 µl of the Diluted LD5 to each well, then cover with Parafilm M or aluminium foil and incubate at
room temperature for 60 min.
b.
Remove the Diluted LD5 solution from each well.
c.
Wash each well with 150 µl of the Diluted LD1 each time for three times.
d.
Add 50 µl of the Diluted LD6 to each well, then cover with Parafilm M or aluminium foil and incubate at
room temperature for 30 min.
e.
Remove the Diluted LD6 solution from each well.
f.
Wash each well with 150 µl of the Diluted LD1 each time for four times.
Note: Ensure any residual wash buffer in the wells is removed as much as possible at each wash step.
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4. Signal Detection
a.
Add 100 µl of LD8 to each well and incubate at room temperature for 1 to 10 min away from light.
Begin monitoring color change in the sample wells and control wells. The LD8 solution will turn blue in
the presence of sufficient demethylated products.
b.
Add 100 µl of LD9 to each well to stop enzyme reaction when color in the positive control wells turns
medium blue. The color will change to yellow after adding LD9 and the absorbance should be read on
a microplate reader within 2 to 10 min at 450 nm with an optional reference wavelength of 655 nm.
Note: (1) Most microplate readers have the capability to carry out dual wavelength analysis and will
automatically subtract reference wavelength absorbance from the test wavelength absorbance. If your
plate reader does not have this capability, the plate can be read twice, once at 450 nm and once at
655 nm. Then, manually subtract the 655 nm ODs from 450 nm ODs; (2) If the strip-well microplate
frame does not fit in the microplate reader, transfer the solution to a standard 96-well microplate.
5. LSD1 Activity Calculation
a.
Calculate the average duplicate readings for the sample wells and blank wells.
b.
Calculate LSD1 activity or inhibition using the following formulas:
For simple calculation:
(Sample OD – Blank OD)
x 1000
LSD1 Activity (OD/min/mg) =
(Protein Amount (µg)* x min**)
* Protein amount (µg) added into the reaction at step 2d.
** Incubation time (minutes) at step 2f.
Example calculation:
Average OD450 of sample is 0.65
Average OD450 of blank is 0.05
Protein amount is 5 µg
Incubation time is 120 minutes (2 hours)
LSD1 activity =
(0.65 – 0.05)
x 1000 = 1 OD/min/mg
(5 x 120)
For accurate or specific activity calculation:
1.
Generate a standard curve and plot OD value versus amount of LD4 at each concentration point.
2.
Determine the slope as OD/ng (you can use Microsoft Excel statistical functions for slope
calculation), then calculate the amount of LSD1-converted demethylated product using the
following formulas:
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(Sample OD – Blank OD)
Demethylated product (ng) =
Slope
Demethylated Product (ng)
x 1000
LSD1 Activity (ng/min/mg) =
(Protein Amount (µg) x min*)
* Incubation time (minutes) at Step 2f.
For inhibition calculation:
Inhibition % =
[
]
Inhibitor Sample OD – Blank OD
1–
No Inhibitor Sample OD – Blank OD
x 100%
SUGGESTED WORKING BUFFER AND SOLUTION SETUP
Table 1. Approximate amount of required buffers and solutions for defined assay wells based on the protocol.
Reagents
1 well
1 strip
(8 wells)
2 strips
(16 wells)
6 strips
(48 wells)
12 strips
(96 wells)
Diluted LD1
2.5 ml
20 ml
40 ml
120 ml
240 ml
LD2
50 µl
400 µl
800 µl
2400 µl
4800 µl
LD3
1 µl
8 µl
16 µl
50 µl
120 µl
LD4
NA
NA
1 µl (optional)
2 µl
2 µl
Diluted LD5
50 µl
400 µl
800 µl
2400 µl
4800 µl
Diluted LD6
50 µl
400 µl
800 µl
2400 µl
4800 µl
Developer Solution
0.1 ml
0.8 ml
1.6 ml
4.8 ml
9.6 ml
Stop Solution
0.1 ml
0.8 ml
1.6 ml
4.8 ml
9.6 ml
SUGGESTED STRIP WELL SETUP
Table 2. The suggested strip-well plate setup for LSD1 activity assay in a 48-assay format (in a 96-assay format, Strips 7 to 12 can be
configured as Sample). The controls and samples can be measured in duplicate.
Well #
A
B
C
D
E
F
G
H
Strip 1
Blank
LD4 0.2 ng
LD4 0.5 ng
LD4 1.0 ng
LD4 2.0 ng
LD4 5.0 ng
Sample
Sample
Strip 2
Blank
LD4 0.2 ng
LD4 0.5 ng
LD4 1.0 ng
LD4 2.0 ng
LD4 5.0 ng
Sample
Sample
Strip 3
Sample
Sample
Sample
Sample
Sample
Sample
Sample
Sample
Strip 4
Sample
Sample
Sample
Sample
Sample
Sample
Sample
Sample
Strip 5
Sample
Sample
Sample
Sample
Sample
Sample
Sample
Sample
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Strip 6
Sample
Sample
Sample
Sample
Sample
Sample
Sample
Sample
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EPIGENTEK
Complete Solutions for Epigenetics
TROUBLESHOOTING
Problem
Possible Cause
Suggestion
No signal or weak
signal in both the
positive control and
sample wells
Reagents are added incorrectly.
Check if reagents are added in the
proper order with the right amount, and
if any steps in the protocol may have
been omitted by mistake.
The well is incorrectly washed
before enzyme reaction.
Ensure the well is not washed prior to
adding the positive control and sample.
Incubation time and
temperature are incorrect.
Ensure the incubation time and
temperature described in the protocol
are followed correctly.
Incorrect absorbance reading.
Check if appropriate absorbance
wavelength (450 nm) is used.
Kit was not stored or handled
properly.
Ensure all components of the kit were
stored at the appropriate temperature
and the cap is tightly capped after each
opening or use.
The standard amount is
insufficiently added to the well
in Step 2c.
Ensure a sufficient amount of standard
is added.
The standard is degraded due
to improper storage conditions.
Follow the Shipping & Storage
guidance in this User Guide for storage
of LD4 (LSD1 Assay Standard).
Insufficient washing of wells.
Check if washing recommendations at
each step is performed according to the
protocol.
Contaminated by sample or
standard.
Ensure the well is not contaminated
from adding sample or standard
accidentally or from using contaminated
tips.
Incubation time with Diluted
LD6 is too long.
The incubation time at Step 3d should
not exceed 2 hours.
Over-development of color.
Decrease the development time in Step
4a before adding LD9 Stop Solution in
Step 4b.
Protein sample is not properly
extracted or purified.
Ensure your protocol is suitable for
LSD1 protein extraction. For the best
results, it is advised to use Epigentek’s
Nuclear Extraction Kit (Cat. No. OP0002). Also, use fresh cells or tissues
for protein extraction, as frozen cells or
tissues could lose enzyme activity.
No signal or weak
signal in only the
standard curve wells
High background
present in the blank
wells
No signal or weak
signal only in sample
wells
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Uneven color
development
Sample amount added into the
wells is insufficient.
Ensure a sufficient amount of purified
enzymes or nuclear extracts is used as
indicated in Step 2. The sample can be
titrated to determine the optimal amount
to use in the assay.
Sample was not stored properly
or has been stored for too long.
Ensure sample is stored in aliquots at –
80°C, with no more than 6 weeks for
nuclear extracts and 6 months for
purified enzymes. Avoid repeated
freezing/thawing.
Little or no activity of LSD1
contained in the sample.
This problem may be a result of many
factors. If the affecting factors cannot
be determined, use new or re-prepared
nuclear extracts or purified enzymes.
Insufficient washing of the wells.
Ensure the wells are washed according
to the guidance of washing and residue
washing buffer is removed as much as
possible.
Delayed color development or
delayed stopping of color
development in the wells.
Ensure color development solution or
stop solution is added sequentially and
is consistent with the order you added
the other reagents (e.g., from well A to
well G or from well 1 to well 12).
RELATED PRODUCTS
Nuclear Extract Preparation
OP-0002-1
EpiQuik™ Nuclear Extraction Kit
Histone Demethylase Activity/Inhibition Assay
P-3077
EpiQuik™ Histone Demthylase (H3-K9 Specific) Activity/Inhibition Fast Assay Kit
P-3079
Epigenase™ LSD1 Demethylase Activity/Inhibition Assay Kit (Fluorometric)
P-3080
Epigenase™ JMJD2 Demethylase Activity/Inhibition Assay Kit (Colorimetric)
P-3081
Epigenase™ JMJD2 Demethylase Activity/Inhibition Assay Kit (Fluorometric)
P-3082
Epigenase™ JARID Demethylase Activity/Inhibition Assay Kit (Colorimetric)
P-3083
Epigenase™ JARID Demethylase Activity/Inhibition Assay Kit (Fluorometric)
LSD1 and Methylated H3-K4 Antibodies
A-3018
LSD1 Polyclonal Antibody
A-4031
Histone H3K4 Monomethyl Polyclonal Antibody
A-4032
Histone H3K4 Dimethyl Polyclonal Antibody
A-1004
Histone H3K4 Trimethyl Polyclonal Antibody
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P-3078
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