label: GDP-galactose:mannose-1-phosphate guanylyltransferase activity
label_lc: gdp-galactose:mannose-1-phosphate guanylyltransferase activity
description: "Catalysis of the reaction: GDP-beta-L-galactose + alpha-D-mannose 1-phosphate = GDP-alpha-D-mannose + beta-L-galactose-1-phosphate."