Fig. 4

Structural bioinformatics analysis of the chitinases of Streptomyces sp. F-3. a Structural models of the catalytic domains of SsChi18A, SsChi18B, and SsChi18C. β-Sheets are shown in yellow, α-helices are shown in red and loops are shown in green. b The structural characteristics of the catalytic domains of SsChi18A, SsChi18B, and SsChi18C. Aromatic residues in the substrate-binding cleft are shown in orange, and the α + β domain is shown in pink