... obtained by3¢-to5¢ RACE of testis RNAs, codes for a predicted one-domain proteinsimilar to the mammalian germinal isoform of angiotensin-convertingenzyme. All amino acid residues involved in ... ispresent in numerous tissues, such as on the surface of endothelial cells in the lung, myocardium, liver, intestineand testis, as well as in the epithelial cells of the kidneyand intestine [3]. ... section of vas deferens, staining is strong in the seminal fluid (sf), with weak staining also being present in the spermatozoid membranes (spz). The walls (w) of the vas deferens are not stained.J....