immunoprecipitation of cell-free products with specific antisera localized the biosynthesis of the subunits of tyrosine hydroxylase ( th ) ( apparent mr = 61,000 ) and of phenylethanolamine n-methyltransferase ( pnmt ) ( apparent mr = 32,000 ) on free polysomes , compared with biosynthesis of subunits of dopamine beta-hydroxylase ( dbh ) ( apparent mr = 67,000 ) on membrane-bound polysomes .
C0020364
hydroxylase
C0013032
dopamine beta-hydroxylase