>7mrz_C mol:protein length:254 Activin receptor type-2B,Activin receptor type-1BSGRGEAETRECIYYNANWELERTNQSGLERCEGEQDKRLHCYASWRNSSGTIELVKKGCWLDDFNCYDRQECVATEENPQVYFCCCEGNFCNERFTHLPEAGGPEVTYEPPPTAPTGGGTHTCPPCPAPELLGSGPRGVQALLCACTSCLQANYTCETDGACMVSIFNLDGMEHHVATCIPKVELVPAGKPFYCLSSEDLRNTHCCYTDYCNRIDLRVPSGHLKEPEHPSMWGPVETGGGTHTCPPCPAPELLG