1FC3:
reference: The trans-activation domain of the sporulation response regulator Spo0A revealed by X-ray crystallography., Lewis RJ, Krzywda S, Brannigan JA, Turkenburg JP, Muchova K, Dodson EJ, Barak I, Wilkinson AJ, Mol Microbiol 2000 Oct;38(2):198-212. PMID: 11069648

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