by contrast , cytosol fractions from hela ( s3 ) cells , mouse liver , and normal human leukocytes each exhibited a major peak of activity ( pl 4.6 , 6.5 , and 4.9 , respectively ) that cleaved only dthd and fdurd , while mouse liver exhibited a second peak ( pl 5.2 ) that cleaved primarily uridine .
C1383501
cytosol
C0007634
cells