3-O-alpha-L-mycarosylerythronolide B + dTDP + H(+) => dTDP-beta-L-mycarose + erythronolide B
3-o-alpha-l-mycarosylerythronolide b + dtdp + h(+) => dtdp-beta-l-mycarose + erythronolide b
3-O-alpha-L-mycarosylerythronolide B + dTDP + H(+) => dTDP-beta-L-mycarose + erythronolide B
3-o-alpha-l-mycarosylerythronolide b + dtdp + h(+) => dtdp-beta-l-mycarose + erythronolide b