Fig. 5From: Enhancing the catalytic activity of a novel GH5 cellulase GtCel5 from Gloeophyllum trabeum CBS 900.73 by site-directed mutagenesis on loop 6Hydrogen bonds probably formed at position 233 within GtCel5 and its variants without substrate. The residue of position 233 is shown in purple. a GtCel5. b N233A. c N233D. d N233GBack to article page