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Zhang Y, Dougherty M, Downs DM, Ealick SE.Zhang Y, et al. Among authors: downs dm.Structure. 2004 Oct;12(10):1809-21. doi: 10.1016/j.str.2004.07.020.Structure. 2004.PMID: 15458630Free article.
Vivas E, Skovran E, Downs DM.Vivas E, et al. Among authors: downs dm.J Bacteriol. 2006 Feb;188(3):1175-9. doi: 10.1128/JB.188.3.1175-1179.2006.J Bacteriol. 2006.PMID: 16428423Free PMC article.