the synthesis and secretion of human chorionic gonadotropin ( hcg ) subunits have been studied by pulse-chase techniques in jar choriocarcinoma cells , which produce both the alpha and beta subunits of hcg `` '' eutopically , '' '' that is , as part of their expected repertoire of gene products , and in three cell lines that produce either alpha or beta subunit `` '' ectopically . '' ''
C0018062
human chorionic gonadotropin
C0106132
beta subunits