NCIt definition : Disulfide-linked homo- and heterodimeric growth factors (Activin A, Activin B, Activin
AB) of the TGF Family with effects on a range of cell types in addition to promoting
FSH release in gonadal sites, depending on subunit composition. Composed of Beta-A
and Beta-B subunits.;
NCIt note : Activin A is a homodimer of inhibin beta A chain. Activin B is a homodimer of inhibin
beta B chain. Activin AB is a heterodimer of beta A and beta B.;