to determine if transferrin is present on the surface of human placental villi , two different immunocytochemical methods have been used : ( 1 ) an unlabeled antibody , peroxidase-antiperoxidase ( pap ) method utilizing rabbit antiserum to human transferrin , goat anti-rabbit igg and rabbit peroxidase-antiperoxidase complex or ;
C0086418
human
C0027021
peroxidase