Fig. 2

Ribbon representations of the structures of the single cysteine mutants of (a) BsCBM3 and (b) RtCBM11 created by SWISS-MODEL using the PDB file 2L8A and 1V0A, respectively, as templates. The residues modified by the MTSSL probes for EPR studies are depicted as dark gray spheres and the residues involved in carbohydrate binding are indicated by black sticks