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