ID 3.1.15.1 DE venom exonuclease. AN venom phosphodiesterase. CA Exonucleolytic cleavage in the 3'- to 5'- direction to yield nucleoside CA 5'-phosphates. CC -!- Preference for single-stranded substrate. CC -!- Similar enzymes: hog kidney phosphodiesterase, Lactobacillus CC exonuclease. //