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Apomyoglobin is a widely used model for studying the molecular mechanisms of globular protein folding. This work aimed to analyze the effects of rigidity and length of loops linking protein secondary structure elements on the stability of the molten globule intermediate state. For this purpose, we studied folding/unfolding of mutant apomyoglobin forms with substitutions of loop‐located proline residues...
Kinetic investigation on the wild-type apomyoglobin and its 12 mutants with substitutions of hydrophobic residues by Ala was performed using stopped-flow fluorescence. Characteristics of the kinetic intermediate I and the folding nucleus were derived solely from kinetic data, namely, the slow-phase folding rate constants and the burst-phase amplitudes of Trp fluorescence intensity. This allowed us...
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