XMP + NH4(+) + ATP <=> GMP + AMP + diphosphate + 2 H(+)
xmp + nh4(+) + atp <=> gmp + amp + diphosphate + 2 h(+)
XMP + NH4(+) + ATP <=> GMP + AMP + diphosphate + 2 H(+)
xmp + nh4(+) + atp <=> gmp + amp + diphosphate + 2 h(+)