Positive Samples: NCI-H460, Cal-27, A-549, 22Rv1. Immunogen sequence: NGLPTVPSDH LPNLYGFSAL HAVHLHQWTL GYPAMHLPRS SFSKVPGTVS SLVDARFQLP AFPWFPHVIQ PKPEITAGGS VPALKTKP. OSR1 is a transcription factor that plays a role in the regulation of embryonic heart