three zones , corresponding to proteins with rf 0.1-0.2 ( i ) , rf 0.5-0.55 ( ii ) and rf 0.85-0.87 ( iii ) and exhibiting thymidine kinase activity , were found in fractions of cytoplasmic and mitochondrial matrix proteins from resting and proliferating rat liver tissues .
C0033684
proteins
C0949610
mitochondrial