1GNS:
reference: Structural basis of thermostability. Analysis of stabilizing mutations in subtilisin BPN'., Almog O, Gallagher DT, Ladner JE, Strausberg S, Alexander P, Bryan P, Gilliland GL, J Biol Chem 2002 Jul 26;277(30):27553-8. Epub 2002 May 13. PMID: 12011071

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