1L47:
reference: Cumulative site-directed charge-change replacements in bacteriophage T4 lysozyme suggest that long-range electrostatic interactions contribute little to protein stability., Sun DP, Soderlind E, Baase WA, Wozniak JA, Sauer U, Matthews BW, J Mol Biol 1991 Oct 5;221(3):873-87. PMID: 1942034

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