Cell Signaling Technology

Product Pathways - Cell Cycle / Checkpoint

p27 Kip1 (SX53G8.5) Mouse mAb #3698

Applications Reactivity Sensitivity MW (kDa) Isotype
W IF-IC F H M R Mk Endogenous 27 Mouse IgG1

Applications Key:  W=Western Blotting  IF-IC=Immunofluorescence (Immunocytochemistry)  F=Flow Cytometry
Reactivity Key:  H=Human  M=Mouse  R=Rat  Mk=Monkey
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

p27 Kip1 (SX53G8.5) Mouse mAb detects endogenous levels of total p27 Kip1 protein.

Source / Purification

Monoclonal antibody is produced by immunizing animals with recombinant human p27 Kip1.

Western Blotting

Western Blotting

Western blot analysis of extracts from NIH/3T3, C6 and MCF-7 cells using p27 Kip1 (SX53G8.5) Mouse mAb.

Flow Cytometry

Flow Cytometry

Flow cytometric analysis of Jurkat cells using p27 Kip1 (SX53G8.5) Mouse mAb versus Propidium Iodide (PI)/RNase Staining Solution #4087. Anti-mouse IgG (H+L), F(ab')2 Fragment (Alexa Fluor® 488 Conjugate) #4408 was used as a secondary Ab.

IF-IC

IF-IC

Confocal immunofluorescent analysis of MCF-7 cells using p27 Kip1 (SX53G8.5) Mouse mAb (green). Actin filaments have been labeled with DY-554 phalloidin (red).


Background

p27 Kip1 is a member of the Cip/Kip family of cyclin-dependent kinase inhibitors. Like its relatives, p57 Kip2 and p21 Waf1/Cip1, the ability to enforce the G1 restriction point is derived from its inhibitory binding to CDK2/cyclin E and other CDK/cyclin complexes. Expression levels of p27 are upregulated in quiescent cells and in cells treated with cAMP or other negative cell cycle regulators. Downregulation of p27 can be induced by treatment with interleukin-2 or other mitogens; this involves phosphorylation of p27 and its degradation by the ubiquitin-proteasome pathway (1-4).

  1. Lloyd, R.V. et al. (1999) Am. J. Pathol. 154, 313-323.
  2. Polyak, K. et al. (1994) Genes Dev. 8, 9-22.
  3. Kato, J.Y. et al. (1994) Cell 79, 487-496.
  4. Vlach, J. et al. (1997) EMBO J. 16, 5334-5344.

Application References

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

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