steviolbioside + UDP-alpha-D-glucose = rebaudioside B + UDP + H(+)
steviolbioside + udp-alpha-d-glucose = rebaudioside b + udp + h(+)
steviolbioside + UDP-alpha-D-glucose = rebaudioside B + UDP + H(+)
steviolbioside + udp-alpha-d-glucose = rebaudioside b + udp + h(+)