the enriched parenchymal cells have been shown to be superior to untreated cells by a number of criteria including : preparation homogeneity , cell morphology , maintenance of cytochrome p-450 , hormonal responsiveness ( measured by the induction of tyrosine aminotransferase after treatment with glucagon or dexamethasone , or both ) , plasma membrane integrity ( determined by both trypan blue exclusion and leakage of glutamic-oxaloacetic transaminase ) , and the dna repair capability after treatment with benzo [ a ] pyrene or 2-acetylaminofluorene .
C0007634
cells
C0007603
plasma membrane