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REACTIVITY SENSITIVITY MW (kDa) Isotype
Rabbit 

Product Usage Information

Storage: Supplied in PBS (pH 7.2), less than 0.1% sodium azide and 2 mg/ml BSA. Store at 4°C. Do not aliquot the antibody. Protect from light. Do not freeze.

Specificity / Sensitivity

HS1 (D83A8) XP® Rabbit mAb (Human Specific) (Alexa Fluor® 647 Conjugate) recognizes endogenous levels of total HS1 protein.


Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Pro310 of human HS1 protein.

Product Description

This Cell Signaling Technology antibody is conjugated to Alexa Fluor® 647 fluorescent dye and tested in-house for direct immunofluorescence and flow cytometric analysis in human cells. This antibody is expected to exhibit the same species cross-reactivity as the unconjugated HS1 (D83A8) XP® Rabbit mAb (Human Specific) #3890.


HS1 (HCLS1, LckBP1, p75) is a protein kinase substrate that is expressed only in tissues and cells of hematopoietic origin (1,2). HS1 contains four cortactin repeats and a single SH3 domain (2). This intracellular protein is phosphorylated following immune receptor activation, which promotes recruitment of HS1 to the immune synapse (3-5). Phosphorylation of HS1 is required to regulate actin dynamics and provide docking sites for many other signaling molecules, such as Vav1 and PLCγ1 (6). HS1 also plays an important role in platelet activation (7).


1.  Kitamura, D. et al. (1989) Nucleic Acids Res 17, 9367-79.

2.  Kitamura, D. et al. (1995) Biochem Biophys Res Commun 208, 1137-46.

3.  Suzuki, H. et al. (1997) J Immunol 159, 5881-8.

4.  Hata, D. et al. (1994) Immunol Lett 40, 65-71.

5.  Yamanashi, Y. et al. (1993) Proc Natl Acad Sci USA 90, 3631-5.

6.  Gomez, T.S. et al. (2006) Immunity 24, 741-52.

7.  Kahner, B.N. et al. (2007) Blood 110, 2449-56.


Entrez-Gene Id 3059
Swiss-Prot Acc. P14317


For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
XP is a registered trademark of Cell Signaling Technology, Inc.
The Alexa Fluor dye antibody conjugates in this product are sold under license from Life Technologies Corporation for research use only, except for use in combination with DNA microarrays. The Alexa Fluor® dyes (except for Alexa Fluor® 430 dye) are covered by pending and issued patents. Alexa Fluor® is a registered trademark of Molecular Probes, Inc.

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HS1 (D83A8) XP® Rabbit mAb (Human Specific) (Alexa Fluor® 647 Conjugate)