Heterodimeric hormone composed of an inhibin alpha subunit complexed with either an inhibin beta-A subunit, to form inhibin A, or an inhibin beta-B subunit, to form inhibin B.
Comment:
Note that the actions of the inhibin complex are the opposite of those of the activin complex, which is a dimer of an inhibin beta-A and/or inhibin beta-B subunit. See also the cellular component term 'activin complex ; GO:0048180'.