(E)-4-coumarate + UDP-alpha-D-glucose => 4-O-(beta-D-glucosyl)-trans-4-coumarate + UDP + H(+)
(e)-4-coumarate + udp-alpha-d-glucose => 4-o-(beta-d-glucosyl)-trans-4-coumarate + udp + h(+)
(E)-4-coumarate + UDP-alpha-D-glucose => 4-O-(beta-D-glucosyl)-trans-4-coumarate + UDP + H(+)
(e)-4-coumarate + udp-alpha-d-glucose => 4-o-(beta-d-glucosyl)-trans-4-coumarate + udp + h(+)