1L35:
reference: Structure of a thermostable disulfide-bridge mutant of phage T4 lysozyme shows that an engineered cross-link in a flexible region does not increase the rigidity of the folded protein., Pjura PE, Matsumura M, Wozniak JA, Matthews BW, Biochemistry 1990 Mar 13;29(10):2592-8. PMID: 2334683

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