beta-D-Glc-(1->4)-alpha-D-Glc-di-trans,octa-cis-undecaprenyl diphosphate + GDP-alpha-D-mannose = alpha-D-Man-(1->3)-beta-D-Glc-(1->4)-alpha-D-Glc-1-di-trans,octa-cis-undecaprenyl diphosphate + GDP + H(+)
beta-d-glc-(1->4)-alpha-d-glc-di-trans,octa-cis-undecaprenyl diphosphate + gdp-alpha-d-mannose = alpha-d-man-(1->3)-beta-d-glc-(1->4)-alpha-d-glc-1-di-trans,octa-cis-undecaprenyl diphosphate + gdp + h(+)
"GDP-mannose:cellobiosyl-diphosphopolyprenol alpha-mannosyltransferase"
"gdp-mannose:cellobiosyl-diphosphopolyprenol alpha-mannosyltransferase"