Immunogen sequence: EGEQDKRLHC YASWRNSSGT IELVKKGCWL DDFNCYDRQE CVATEENPQV YFCCCEGNFC NERFTHLPEA GGPEVTYEPP PTAPTLLTVL AYSLLPIGGL S; Positive Samples: U-87MG, K-562; Cellular Location: Cell membrane, Single-pass type I membrane protein. ACVR2B is a type