it was active in radioimmunoassays ( ria ) using antisera either to the hcg beta carboxyterminal peptide ( ctp ) or to the desialylated hcg beta ctp ( hcg beta as-ctp ) , indicating the presence of not only the hcg beta carboxyterminus but also desialylated o-serine-linked carbohydrate side chains on the fragment .
C0106132
hcg beta
C1141639
hcg