Guanine + H2O => Xanthine + NH4+ (Canis familiaris)
guanine + h2o => xanthine + nh4+ (canis familiaris)
Guanine + H2O => Xanthine + NH4+ (Canis familiaris)
guanine + h2o => xanthine + nh4+ (canis familiaris)