label: bis(5'-nucleosyl)-tetraphosphatase (asymmetrical) activity
label_lc: bis(5'-nucleosyl)-tetraphosphatase (asymmetrical) activity
description: "Catalysis of the reaction: P(1),P(4)-bis(5'-nucleosyl)tetraphosphate + H2O = NTP + NMP. Acts on bis(5'-guanosyl)-, bis(5'-xanthosyl)-, bis(5'-adenosyl)- and bis(5'-uridyl)-tetraphosphate."