Guanine + H2O => Xanthine + NH4+ (Xenopus tropicalis)
guanine + h2o => xanthine + nh4+ (xenopus tropicalis)
Guanine + H2O => Xanthine + NH4+ (Xenopus tropicalis)
guanine + h2o => xanthine + nh4+ (xenopus tropicalis)