analyses of reaction products with snake venom phosphodiesterase digestion revealed that poly ( adp-ribose ) synthesized in nuclei of normal mucosa , adenomatous polyps , and cancers had the average chain lengths of 2.9 , 1.7 , and 9.7 adp-ribose units , respectively .
C0032403
poly ( adp-ribose
C0001461
adp-ribose