2B83:
reference: A single proline substitution is critical for the thermostabilization of Clostridium beijerinckii alcohol dehydrogenase., Goihberg E, Dym O, Tel-Or S, Levin I, Peretz M, Burstein Y, Proteins. 2007 Jan 1;66(1):196-204. PMID: 17063493

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