label: beta-D-galactosyl-(1->4)-N-acetyl-D-glucosamine + UDP + H(+) => N-acetyl-D-glucosamine + UDP-alpha-D-galactose
label_lc: beta-d-galactosyl-(1->4)-n-acetyl-d-glucosamine + udp + h(+) => n-acetyl-d-glucosamine + udp-alpha-d-galactose