Recombinat Protein,Human Activin RIIB ACVR2B Protein, His Tag,Human Activin RIIB, His Tag (ACB-H5226) is expressed from human 293 c ells (HEK293). It contains AA Ser 19 - Thr 137 (Accession NP001097).This protein carries a polyhistidine tag at the C 1 * 1 mg