an anthocyanidin 3-O-beta-D-sambubioside + UDP-alpha-D-glucose => an anthocyanidin 5-O-beta-D-glucoside 3-O-beta-D-sambubioside + UDP + H(+)
an anthocyanidin 3-o-beta-d-sambubioside + udp-alpha-d-glucose => an anthocyanidin 5-o-beta-d-glucoside 3-o-beta-d-sambubioside + udp + h(+)