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Immunohistochemical analysis of paraffin-embedded human colon carcinoma, using AMPKβ1/2 (57C12) Rabbit mAb #4150 in the presence of control peptide (left) or AMPKβ1/2 Blocking Peptide (right).

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Product Description

This peptide is used specifically to block AMPKβ 1/2 (57C12) Rabbit mAb #4150 reactivity.


Quality Control

The quality of the peptide was evaluated by reversed-phase HPLC and by mass spectrometry. The peptide blocks AMPKβ1/2 (57C12) Rabbit mAb #4150 by immunohistochemistry.

Product Usage Information

Use as a blocking reagent to evaluate the specificity of antibody reactivity in immunohistochemistry protocols. For immunohistochemistry, add twice the volume of peptide as volume of antibody used in 100 µl total volume. Incubate for a minimum of 30 minutes prior to adding the entire volume to the slide. Recommended antibody dilutions can be found on the relevant product data sheet.


Storage: Supplied in 20 mM potassium phosphate (pH 7.0), 50 mM NaCl, 0.1 mM EDTA, 1 mg/ml BSA and 5% glycerol. Store at –20°C.

AMP-activated protein kinase (AMPK) is highly conserved from yeast to plants and animals and plays a key role in the regulation of energy homeostasis (1). AMPK is a heterotrimeric complex composed of a catalytic α subunit and regulatory β and γ subunits, each of which is encoded by two or three distinct genes (α1, 2; β1, 2; γ1, 2, 3) (2). The kinase is activated by an elevated AMP/ATP ratio due to cellular and environmental stress, such as heat shock, hypoxia, and ischemia (1). The tumor suppressor LKB1, in association with accessory proteins STRAD and MO25, phosphorylates AMPKα at Thr172 in the activation loop, and this phosphorylation is required for AMPK activation (3-5). AMPKα is also phosphorylated at Thr258 and Ser485 (for α1; Ser491 for α2). The upstream kinase and the biological significance of these phosphorylation events have yet to be elucidated (6). The β1 subunit is post-translationally modified by myristoylation and multi-site phosphorylation including Ser24/25, Ser96, Ser101, Ser108, and Ser182 (6,7). Phosphorylation at Ser108 of the β1 subunit seems to be required for the activation of AMPK enzyme, while phosphorylation at Ser24/25 and Ser182 affects AMPK localization (7). Several mutations in AMPKγ subunits have been identified, most of which are located in the putative AMP/ATP binding sites (CBS or Bateman domains). Mutations at these sites lead to reduction of AMPK activity and cause glycogen accumulation in heart or skeletal muscle (1,2). Accumulating evidence indicates that AMPK not only regulates the metabolism of fatty acids and glycogen, but also modulates protein synthesis and cell growth through EF2 and TSC2/mTOR pathways, as well as blood flow via eNOS/nNOS (1).


This peptide is used specifically to block AMPKβ 1/2 (57C12) Rabbit mAb #4150 reactivity.


1.  Carling, D. (2004) Trends Biochem Sci 29, 18-24.

2.  Hawley, S.A. et al. (1996) J Biol Chem 271, 27879-87.

3.  Lizcano, J.M. et al. (2004) EMBO J 23, 833-43.

4.  Hardie, D.G. (2004) J Cell Sci 117, 5479-87.

5.  Shaw, R.J. et al. (2004) Proc Natl Acad Sci USA 101, 3329-35.

6.  Woods, A. et al. (2003) J Biol Chem 278, 28434-42.

7.  Warden, S.M. et al. (2001) Biochem J 354, 275-83.


Entrez-Gene Id 5564 , 5565
Swiss-Prot Acc. Q9Y478 , O43741


For Research Use Only. Not For Use In Diagnostic Procedures.
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