... and NNC-FKBP22. A His-tagattached to the N-termini of the proteins isrepresented by a shaded box. The a-helicesand b-strands are represented by cylindersand arrows, respectively. These secondarystructures ... closeproximity to the Met8 of the other monomer. Bothresidues are located close to the bottom of the cleft of the V-shaped structure. Therefore, it is stronglyexpected that the mutant protein, termed NNC-FKBP22, ... the presence or absence of the enzyme. The final concentrations of RNase T1and theenzyme were 0.2 lm and 10 nm, respectively. The refoldingreaction was monitored by measuring the increase in...