it was shown that , both in vitro and in vivo gamma-glytamyltransferase and dipeptidylpeptidase iv are demonstrable in the apical cell membranes ( membrane-bound hydrolases ) , while acid phosphatase , dipeptidylpeptidases i , ii and acid beta-galactosidase are concentrated in the supranuclear vacuoles ( lysosomal hydrolases ) , and cytoplasmic lactate dehydrogenase and mitochondrial enzymes ( succinate dehydrogenase , nad-dependent isocitrate dehydrogenase , cytochrom oxidase ) are localized in the whole cytoplasm and mainly in the apical cytoplasm , respectively , of the visceral yolk-sac epithelium .
C0042219
vacuoles
C0010834
cytoplasm