sucrose + UDP + H(+) => D-fructose + UDP-alpha-D-glucose
sucrose + udp + h(+) => d-fructose + udp-alpha-d-glucose
sucrose + UDP + H(+) => D-fructose + UDP-alpha-D-glucose
sucrose + udp + h(+) => d-fructose + udp-alpha-d-glucose