2LPZ:
reference: Atomic model of the type III secretion system needle., Loquet A, Sgourakis NG, Gupta R, Giller K, Riedel D, Goosmann C, Griesinger C, Kolbe M, Baker D, Becker S, Lange A, Nature. 2012 May 20;486(7402):276-9. doi: 10.1038/nature11079. PMID: 22699623

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