N(2)-(ADP-D-ribosyl)-guanine + nicotinamide + H(+) => guanine + NAD(+)
n(2)-(adp-d-ribosyl)-guanine + nicotinamide + h(+) => guanine + nad(+)
N(2)-(ADP-D-ribosyl)-guanine + nicotinamide + H(+) => guanine + NAD(+)
n(2)-(adp-d-ribosyl)-guanine + nicotinamide + h(+) => guanine + nad(+)