dipeptidyl peptidase iv was detected at the same sites as the aminopeptidases and , in addition , in amniotic epithelial cells , fibroblasts of the villous stroma , endothelium of chorionic plate and villous blood vessels as well as in the basophilic cytotrophoblast cells ( x-cells ) of the basal plate and paraplacenta , and it possibly also occurred in some domains of the plasma membrane of the syncytiotrophoblast and cytotrophoblast cells .
C0016030
fibroblasts
C0007634
cells