vitexin + UDP-alpha-D-glucose <=> vitexin 2''-O-beta-D-glucoside + UDP + H(+)
vitexin + udp-alpha-d-glucose <=> vitexin 2''-o-beta-d-glucoside + udp + h(+)
vitexin + UDP-alpha-D-glucose <=> vitexin 2''-O-beta-D-glucoside + UDP + H(+)
vitexin + udp-alpha-d-glucose <=> vitexin 2''-o-beta-d-glucoside + udp + h(+)