alpha-D-mannose 1-phosphate + GTP + H(+) = GDP-alpha-D-mannose + diphosphate
alpha-d-mannose 1-phosphate + gtp + h(+) = gdp-alpha-d-mannose + diphosphate
"mannose-1-phosphate guanylyltransferase"
"mannose-1-phosphate guanylyltransferase"