adp-ribose-whole histones x adducts formed by adp-ribosyltransferase served as initiators for poly ( adp-ribose ) synthesis when these adducts were incubated in the presence of nad , dna , mg2+ , and the purified poly ( adp-ribose ) synthetase , in which poly ( adp-ribose ) formation can occur .
C0001461
adp-ribose
C0032403
poly ( adp-ribose