in contrast to the latter enzyme , this new enzyme catalyzed the spliting of a linkage between adp-ribose and a protein portion in mono adp-ribosylated histone h2b but little , if any , of the glycosidic ribosyl ( 1 '' '' -2 ' ) ribose bonds within poly ( adp-ribose ) .
C0001461
adp-ribose
C0032403
ribos