4UAQ:
reference: Structural similarities and differences between two functionally distinct SecA proteins: the Mycobacterium tuberculosis SecA1 and SecA2., Swanson S, Ioerger TR, Rigel NW, Miller BK, Braunstein M, Sacchettini JC, J Bacteriol. 2015 Dec 14. pii: JB.00696-15. PMID: 26668263

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