ID 2.7.7.28 DE nucleoside-triphosphate-aldose-1-phosphate nucleotidyltransferase. AN GDP hexose pyrophosphorylase. AN GTP:alpha-D-hexose-1-phosphate guanylyltransferase. AN guanosine diphosphohexose pyrophosphorylase. AN hexose-1-phosphate guanylyltransferase. AN hexose 1-phosphate nucleotidyltransferase. AN hexose nucleotidylating enzyme. AN NDP-hexose diphosphorylase. AN NDP-hexose pyrophosphorylase. AN NTP:hexose-1-phosphate nucleotidyltransferase. AN nucleoside diphosphohexose pyrophosphorylase. AN nucleoside-triphosphate-hexose-1-phosphate nucleotidyltransferase. CA nucleoside triphosphate + alpha-D-aldose 1-phosphate = diphosphate + NDP- CA hexose. CC -!- In decreasing order of activity, guanosine, inosine and adenosine CC diphosphate hexoses are substrates in the reverse reaction, with CC either glucose or mannose as the sugar. CC -!- Formerly EC 2.7.7.29. //