Composite active site of chondroitin lyase ABC accepting both epimers of uronic acid.
Shaya, D., Hahn, B.S., Bjerkan, T.M., Kim, W.S., Park, N.Y., Sim, J.S., Kim, Y.S., Cygler, M.(2008) Glycobiology 18: 270-277
- PubMed: 18227125 
- DOI: 10.1093/glycob/cwn002
- Primary Citation of Related Structures:  
2Q1F - PubMed Abstract: 
Enzymes have evolved as catalysts with high degrees of stereospecificity. When both enantiomers are biologically important, enzymes with two different folds usually catalyze reactions with the individual enantiomers. In rare cases a single enzyme can process both enantiomers efficiently, but no molecular basis for such catalysis has been established ...