https://www.ncbi.nlm.nih.gov/Structure/pdb/1HM2
1HM2: ACTIVE SITE OF CHONDROITINASE AC LYASE REVEALED BY THE STRUCTURE OF ENZYME-OLIGOSACCHARIDE...
CHONDROITINASE AC2-DEOXY-2-ACETAMIDO-BETA-D-GALACTOSE-4-SULFATE2-O-METHYL FUCOSEALPHA-D-MANNOSEALPHA-L-RHAMNOSEBETA-D-XYLOPYRANOSECALCIUM IOND-GLUCURONIC...