Fig. 6.

Substrate binding in sorghum peroxidase. a Figure showing binding of IAA at the γ-heme edge. The nitrogen atom of IAA makes a hydrogen bond to the carbonyl oxygen of Thr111 (2.75 Å). b Hydrogen bonding structure around W83, and binding of glycerol at the δ-heme edge. W83 makes hydrogen bonds to ND1 of His 81 (2.76 Å), NE (2.79 Å) and NH2 (3.0 Å) of Arg 77, and oxygen atom of glycerol (2.7 Å). In both figures, the 2F_o-F_c map is contoured at 1σ