Anti-PhosphoSerine Antibody Biotin Conjugated reacts specifically with phosphoserine and shows minimal reactivity by ELISA and western blotting with proteins containing phosphotyrosine or phosphothreonine residues. Anti-PhosphoSerine Antibody Biotin Conjugated reacts with free phosphoserine, phospho-serine conjugated to carriers such as thyroglobulin or BSA, and detects the presence of phosphoserine in proteins of both unstimulated and stimulated cell lysates. Although not tested, this antibody is likely functional in RIA, flow cytometry and immunohistochemistry. Specific conditions should be optimized by user.