| 1DBI: reference: Calcium-mediated thermostability in the subtilisin superfamily: the crystal structure of Bacillus Ak.1 protease at 1.8 A resolution., Smith CA, Toogood HS, Baker HM, Daniel RM, Baker EN, J Mol Biol 1999 Dec 10;294(4):1027-40. PMID: 10588904 |
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