Figure 4From: A highly conserved arginine residue of the chitosanase from Streptomyces sp. N174 is involved both in catalysis and substrate bindingThermal unfolding curves of mutant chitosanases in the absence or presence of (GlcN) 3 . (A) R42K chitosanase. (B) R42E chitosanase. The unfolding process was monitored by CD at 222 nm.Back to article page