a 24,000 dalton protein with follicle stimulating hormone ( fsh ) -releasing activity , named activin , has been characterized previously from porcine follicular fluid as a heterodimer composed of the beta-subunits of inhibins a and b linked by disulfide bond ( s ) [ ling et al . ( 1986 ) nature , in press ] .
C0050668
activin
C0106025
beta-subunits