nuclei were incubated in the absence and presence of exogenous primer in order to distinguish the chromatin-associated poly ( a ) polymerase from the `` '' free '' '' enzyme ( jacob , s.t. , roe , f.j. and rose , k.m . ( 1976 ) biochem . j . 153 , 733 -- 735 ) .
C0007610
nuclei
C0008546
chromatin