4MAD:
reference: Rational design of a glycosynthase by the crystal structure of beta-galactosidase from Bacillus circulans (BgaC) and its use for the synthesis of N-acetyllactosamine type 1 glycan structures., Henze M, You DJ, Kamerke C, Hoffmann N, Angkawidjaja C, Ernst S, Pietruszka J, Kanaya S, Elling L, J Biotechnol. 2014 Jul 14. pii: S0168-1656(14)00337-X. doi:, 10.1016/j.jbiotec.2014.07.003. PMID: 25034434

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).