eight choriocarcinomas and two immature placentas were stained with a polyclonal rabbit anti-beta-human chorionic gonadotropin ( beta-hcg ) , a monoclonal mouse hybridoma anti-beta-hcg ( moab1 ) , and a monoclonal mouse hybridoma antibody that recognizes only a free beta-hcg chain ( moab2 ) .
C0032043
placentas
C0106132
beta-hcg