The customer tested the FKRP Polyclonal Antibody (STJ93080) from St John's Laboratory on HeLa cell lysate via western blot. The antibody was used at a 1:500 dilution and detected a band around 55 kDa for FKRP as well as two additional bands. The customer from Istituto di Genetica Molecolare-CNR in Italy reported that the results provided the predicted molecular weight detection of FKRP and they were satisfied with the antibody's performance. St John's Laboratory encourages customers to test their products for free in order to provide independent validation reviews.

1. HOW DID OUR
ANTIBODY PERFORM?
CUSTOMER REVIEW: FKRP Polyclonal Antibody (STJ93080)

2. WHAT WAS USED?
Primary antibody: STJ93080 FKRP Polyclonal
Antibody
Provider: St John's Laboratory
Dilution ratio: 1:500
Application: Western Blot.
Materials for validation: HeLa cell line

3. WHAT WAS THE PROTOCOL?
Treatment of materials: When cells were cultured to 90% plating density, RIPA buffer with
protease inhibitors (Roche) and equal volume of 2X loading buffer were added for 10 min water
bath at 100˚C.
Gel electrophoresis: 4-20% polyacrylamide gel (Bio-Rad), constant voltage 180V, 40 min.
Transfer: 0.25 nm nitrocellulose membrane, by using the Trans-Blot Turbo transfer system
(Bio-Rad) for 7 minutes.
Blocking: 1X TBST with 5% skimmed milk powder for 1 hr at room temperature.
Primary antibody probing: Primary antibody was added to the solution of 1X TBST with 5%
skimmed milk powder, 4˚C overnight.
Membrane wash: 1X TBST wash for 3 times.
Secondary antibody probing: Secondary antibody was added to the solution of 1X TBST with
5% skimmed milk powder with 1:10000 dilution ratio, for 1 hr.
Membrane wash: 1X TBST wash for 3 times.
Visualization: Chemiluminescent signal obtained by using the SuperSignal West
Chemiluminescent Substrate (Pierce) were detected using the ChemiDoc™ XRS system
(BioRad) with an exposure time of 2 minutes.

4. WHAT WAS THE PROTOCOL?
Gel electrophoresis information：4-20% Mini-Protean TGX Gels (Bio-Rad), constant voltage 180 V, 40 min.
Transfer information：0.25 nm nitrocellulose membrane, by using the Trans-Blot Turbo transfer system (Bio-Rad)
for 7 minutes.
No. Antigen
Loading
amount
Primary
antibody
Primary
antibody
dilution
ratio
Secondary
antibody
dilution ratio
Target band
(KDa)
Visualization
time
1 HeLa lysate 20 µg
STJ93080.
FKRP
Polyclonal
Antibody
1:500 1:10000 ~55KDa 2 mins

5. WHAT DID THE CUSTOMER THINK?
Testing results were provided by Manuela Lanzafame, PhD
from Istituto di Genetica Molecolare-CNR, Italy. They stated
that “In HeLa cells the STJ93080 FKRP antibody detects a
band of the predicted molecular weight of ~55 KDa and two
additional bands.”

6. “WE INVITE YOU TO TEST OUR PRODUCTS”
Our aim is to not only connect our customers
with the best product, but to also give them
the opportunity to test the product’s
performance risk free.

7. Contact Us: info@stjohnslabs.com
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