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Anti-Phospho-Ser<sup>190</sup> Progesterone Receptor

Anti-Phospho-Ser<sup>190</sup> Progesterone Receptor

Specific for the ~90k PR-A isoform and the ~120k PR-B isoform phosphorylated at Ser190. Immunolabeling is blocked by the phosphopeptide used as antigen but not by the corresponding dephosphopeptide. Prepared by affinity purification using a protein G column.

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SPECIFICATIONS

Size

100 ul

Applications

IHC, WB

Hosts

Mouse

Reactivities

Hum

Clone

1154

Format

Affinity purified, monoclonal antibody

Presku

OAPC00222

Target

There is accumulating evidence to suggest that progesterone plays an essential role in the regulation of growth and differentiation of mammary glands and thus may play a key role in breast cancer (Edwards, 2005). The biological response to progesterone is mediated by two distinct forms of the human progesterone receptor (PR-A and PR-B forms). In most cell contexts, the B form functions as a transcriptional activator, whereas the A form functions as a transcriptional inhibitor of steroid hormones (Attia et al., 2000; Lin et al., 2003). Recently it has been demonstrated that there is differential hormone dependent regulation of the phosphorylation of the A and B forms of the receptor (Clemm et al., 2000). Treatment of T47D breast cancer cells with progestin agonist increases the phosphorylation of Ser190 and Ser294 with different kinetics. These phosphorylation events may differentially affect the transcriptional activity of the receptor.

Weight

~90-120 kDa

Gene Id

5241

Isotype

IgG<sup>1</sup>

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