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Document # 00522216-1009-00
Rockland, ME 04841 USAProSieve® Unstained Protein Marker II, 10 kDa – 200 kDa
Instructions for Use
Introduction

Contents

ProSieve® Unstained Protein Marker II is a mixtureof 11 recombinant, highly purified proteins designedfor sharp and accurate sizing of proteins in SDSpolyacrylamide gel electrophoresis, as well as on
PVDF, nylon and nitrocellulose membranes. The
proteins resolve into clearly identifiable sharp bands
from 10 kDa to 200 kDa when analyzed by SDSPAGE and stained with Coomassie Blue1.

Cat. No. 00193839
ProSieve® Unstained Protein Marker II, 2 x 250 µl(100 minigel applications @ 5 µl per well or 50 large
gel applications @ 10 µl per well)
Storage Buffer
62.5 mM Tris-H3PO4 (pH 7.5), 1 mM EDTA, 2%SDS, 0.1 M DTT, 1 mM NaN3, 0.01% bromophenol
blue and 33% glycerol.

Exact masses of the proteins in this marker are: 10,15, 20, 30, 40, 50, 70, 100, 120, 150, and 200 kDa.
The 50 kDa band is higher intensity for easieridentification. Each protein contains an integral
Strep-tag® II sequence (WSHPQFEK) and may be
detected on Western blots using Strep-Tactin®-APconjugate or antibody against Strep-tag® II2 ,3 .

Store at -20°C for 2 years from date of manufacture
Protocol1. Thaw Ladder at room temperature or heat at 3740°C for a few minutes to dissolve precipitatedsolids. DO NOT BOIL!
2. Mix gently, but thoroughly to ensure the solution
is homogeneous.
3. Load the following volumes of the marker on anSDS-polyacrylamide gel.
For GelFor BlotAnalysis AnalysisMinigel
5 μl
3 μl
Large gel
10 μl
6 μl

ProSieve® Unstained Protein Marker II is ideal for
precise molecular weight determination ofpolypeptides in denaturing polyacrylamide gels andWestern blots1, 4.
ProSieve® Unstained Protein Marker II
10 kDa – 200 kDa

4. After the run is complete, stain the gel or
perform Western transfer procedure as desired.
NOTES
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The 50 kDa and 10 kDa protein bands are ofgreater intensity and serve as a reference.
Low molecular weight proteins may migrate withthe dye front on low concentration gels (e.g.
7.5% & 10%).
Loading volumes are indicated for gels with athickness of 1 mm. If thicker gels are used, theloading volume should be increased.
When Western blots are performed, ProSieve®
QuadColor™ Protein Marker can be used formonitoring of transfer efficiency.

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Strep-tag® II Sequence Detection Systems are
not supplied by Lonza. Detection systems areavailable from IBA (see www.iba-go.de).
The 200 kDa band has lower intensity than theother bands when detected on Western blotsusing Strep-Tactin®-AP conjugate.
ProSieve® Unstained Protein Marker II is
optimized for use with ProSieve® Blue Protein
Staining Solution or Coomassie® Brilliant Blue
R-250 Stain.
For silver staining the amount of ProSieve®
Unstained Protein Marker II applied might bedecreased up to 10 times.

References
1. Laemmli, U.K. (1970). Cleavage of structuralproteins during the assembly of the head ofbacteriophage T4. Nature. 227: 680-685.
2. Schmidt, T. G. M. & Skerra, A (1993). The
random peptide library-assisted engineering of aC-terminal affinity peptide, useful for thedetection and purification of a functional Ig Fvfragment. Prot. Engineering. 6: 109-122.
3. Tsiotis, G., Haase, W., Engel, A. & Michel, H.
(1995). Isolation and structural characterizationof trimeric cyanobacterial photosystem I
complex with the help of recombinant antibody
fragments. Eur. J. Biochem. 231: 823-830.
4. Current Protocols in Molecular Biology, vol. 1(Ausubel, FM., et al., ed), John Wiley & Sons,Inc., Brooklyn, New York 10.2A, 10.6.-10.8,
1994-2002.
Product Safety
For details regarding product safety, see Material
Safety Data Sheet (MSDS); call +1 (800) 638-8174
for extra copies of the MSDS. Emergency afterhours, call collect +1 (303) 595-9048.
Manufactured for Lonza Rockland, Inc.
For Research Use Only.
Not For Use In Diagnostic Procedures.
This product is manufactured under the license for Strep®
tag technology covered by US patents Nos. 5,506,121,6,103,493 and foreign counterparts.
Strep-tag® and Strep-Tactin® are registered trademarks ofInstitut fur Bioanalytic GmbH. All other trademarks herein
are marks of Lonza Group or its affiliates.

©2009 Lonza Rockland, Inc.
All rights reserved.

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