Anti-ESR1 (phospho S167) Antibody

Phosphorylation at serine 167 is a key activating modification on estrogen receptor alpha (ESR1), and this 200 µl aliquot of unconjugated rabbit polyclonal IgG from Antibodies.com is raised specifically against the phospho-S167 epitope for use in Western Blot detection of Human ERα activation. The polyclonal reagent captures multiple determinants around the modified residue, supporting research use only studies that map ligand-induced or kinase-driven signaling through the MAPK/ERK and mTOR pathways in estrogen-responsive cell lines and breast tumor lysates. ESR1 phospho-S167 status is frequently tracked as a functional readout in endocrine response and resistance models, where the modified receptor band is compared with total ERα levels and downstream transcriptional targets.