(R)-mandelonitrile + UDP-alpha-D-glucose => (R)-prunasin + UDP + H(+)
(r)-mandelonitrile + udp-alpha-d-glucose => (r)-prunasin + udp + h(+)
(R)-mandelonitrile + UDP-alpha-D-glucose => (R)-prunasin + UDP + H(+)
(r)-mandelonitrile + udp-alpha-d-glucose => (r)-prunasin + udp + h(+)