isoelectric focusing profiles for the cytosol fractions from ehrlich ascites cells and from novikoff hepatoma cells each consisted essentially of one peak of nucleoside phosphorylase activity [ isoelectric points ( pl ) 5.4 and 5.8 , respectively ] that cleaved both uridine and thymidine ( dthd ) , as well as fdurd .
C1383501
cytosol
C0007634
cells