zeatin + UDP-alpha-D-xylose = O-beta-D-xylosylzeatin + UDP + H(+)
zeatin + udp-alpha-d-xylose = o-beta-d-xylosylzeatin + udp + h(+)
"uridine diphosphoxylose-zeatin xylosyltransferase"
"uridine diphosphoxylose-zeatin xylosyltransferase"