an inositol-1-phosphodihydroceramide + GDP-alpha-D-mannose => a mannosylinositol-1-phosphoceramide + GDP + H(+)
an inositol-1-phosphodihydroceramide + gdp-alpha-d-mannose => a mannosylinositol-1-phosphoceramide + gdp + h(+)
an inositol-1-phosphodihydroceramide + GDP-alpha-D-mannose => a mannosylinositol-1-phosphoceramide + GDP + H(+)
an inositol-1-phosphodihydroceramide + gdp-alpha-d-mannose => a mannosylinositol-1-phosphoceramide + gdp + h(+)