Abstract:Myostatin (MSTN) and activin are members of the transforming growth factor-β superfamily. Both signal through the activin type II receptors (ActRII and ActRIIB). In a previous report, we demonstrated that fish possess at least 2 genes for ActRIIB: ActRIIB-1 and ActRIIB-2, which differ in their amino acid sequence. We also showed that affinity-purified, fish-soluble ActRIIB-1 (extracellular domain; ECD), produced in the yeast Pichia pastoris, inhibited recombinant mouse/rat/human mature MSTN activity in vitro u… Show more
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