Cell Signaling Technology

Product Pathways - Neuroscience

Phospho-CREB (Ser133) (87G3) Rabbit mAb (Alexa Fluor® 647 Conjugate) #14001

No. Size Price
14001S 100 µl ( 50 tests ) ¥3,986.00 现货查询 购买询价
14001 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
F 1:50 Human,Mouse,Rat, Endogenous Rabbit IgG
IF-F 1:200
IF-IC 1:200

Species cross-reactivity is determined by western blot.

Applications Key: F=Flow Cytometry, IF-F=Immunofluorescence (Frozen), IF-IC=Immunofluorescence (Immunocytochemistry),


Species predicted to react based on 100% sequence homology: Zebrafish,

Specificity / Sensitivity

Phospho-CREB (Ser133) (87G3) Rabbit mAb (Alexa Fluor® 647 Conjugate) recognizes endogenous levels of CREB only when phosphorylated at Ser133. The antibody also recognizes the phosphorylated form of the CREB-related protein, ATF-1.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser133 of human CREB protein.


This Cell Signaling Technology antibody is conjugated to Alexa Fluor® 647 fluorescent dye and tested in-house for direct flow cytometry analysis in human cells and immunofluorescence analysis in human cells and rat tissue. This antibody is expected to exhibit the same species cross-reactivity as the unconjugated Phospho-CREB (Ser133) (87G3) Rabbit mAb #9198.



Confocal immunofluorescent analysis of SK-N-MC cells (serum-starved overnight), untreated (left) or treated with IBMX (0.5 mM) and Forskolin #3828 (30 μM, 30 min; right), using Phospho-CREB (Ser133) (87G3) Rabbit mAb (Alexa Fluor® 647 Conjugate) (blue pseudocolor). Actin filaments were labeled with Alexa Fluor® 488 Phalloidin #8878 (green).



Confocal immunofluorescent analysis of p14 rat brain dentate gyrus using Phospho-CREB (Ser133) (87G3) Rabbit mAb (Alexa Fluor® 647 Conjugate) (blue pseudocolor). Actin filaments were labeled with Alexa Fluor® 488 Phalloidin #8878 (green). Red pseudocolor = Propidium Iodide (PI)/RNase Staining Solution #4087. Views shown are 10X magnification (left) and 60X magnification (right).

Flow Cytometry

Flow Cytometry

Flow cytometric analysis of serum-starved SK-N-MC cells, untreated (blue) or treated with IBMX (0.5 mM) and Forskolin #3828 (30 μM, 30 min; green), using Phospho-CREB (Ser133) (87G3) Rabbit mAb (Alexa Fluor® 647 Conjugate).


CREB is a bZIP transcription factor that activates target genes through cAMP response elements. CREB is able to mediate signals from numerous physiological stimuli, resulting in regulation of a broad array of cellular responses. While CREB is expressed in numerous tissues, it plays a large regulatory role in the nervous system. CREB is believed to play a key role in promoting neuronal survival, precursor proliferation, neurite outgrowth, and neuronal differentiation in certain neuronal populations (1-3). Additionally, CREB signaling is involved in learning and memory in several organisms (4-6). CREB is able to selectively activate numerous downstream genes through interactions with different dimerization partners. CREB is activated by phosphorylation at Ser133 by various signaling pathways including Erk, Ca2+, and stress signaling. Some of the kinases involved in phosphorylating CREB at Ser133 are p90RSK, MSK, CaMKIV, and MAPKAPK-2 (7-9).

  1. Lonze, B.E. et al. (2002) Neuron 34, 371-85.
  2. Lee, M.M. et al. (1999) J Neurosci Res 55, 702-12.
  3. Redmond, L. et al. (2002) Neuron 34, 999-1010.
  4. Dash, P.K. et al. (1990) Nature 345, 718-21.
  5. Yin, J.C. et al. (1994) Cell 79, 49-58.
  6. Guzowski, J.F. and McGaugh, J.L. (1997) Proc Natl Acad Sci USA 94, 2693-8.
  7. Xing, J. et al. (1998) Mol Cell Biol 18, 1946-55.
  8. Ribar, T.J. et al. (2000) J Neurosci 20, RC107.
  9. Tan, Y. et al. (1996) EMBO J 15, 4629-42.

Application References

Have you published research involving the use of our products? If so we'd love to hear about it. Please let us know!


Companion Products

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

U.S. Patent No. 5,675,063.

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.

Alexa Fluor is a registered trademark of Life Technologies Corporation.

The Alexa Fluor dye conjugates in this product are sold under license from Life Technologies Corporation, for research use only excluding use in combination with DNA microarrays and high content screening (HCS).

This product is provided under an intellectual property license from Life Technologies Corporation. The transfer of this product is contingent on the buyer using the purchased product solely in research, including use with HCS or other automated imaging applications but excluding use in combination with DNA microarrays. The buyer must not sell or otherwise transfer this product or its components for (a) diagnostic, therapeutic or prophylactic purposes; (b) testing, analysis or screening services, or information in return for compensation on a per-test basis; (c) manufacturing or quality assurance or quality control, or (d) resale, whether or not resold for use in research. For information on purchasing a license to this product for purposes other than as described above, contact Life Technologies Corporation, 5791 Van Allen Way, Carlsbad, CA 92008 USA or outlicensing@lifetech.com.

Cell Signaling Technology® is a trademark of Cell Signaling Technology, Inc.

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