label: UDP-N-acetyl-alpha-D-glucosamine(out) + UDP-alpha-D-galactose(in) => UDP-N-acetyl-alpha-D-glucosamine(in) + UDP-alpha-D-galactose(out)
label_lc: udp-n-acetyl-alpha-d-glucosamine(out) + udp-alpha-d-galactose(in) => udp-n-acetyl-alpha-d-glucosamine(in) + udp-alpha-d-galactose(out)