5UB6:
reference: A bipartite periplasmic receptor-diguanylate cyclase pair (XAC2383-XAC2382) in the bacterium Xanthomonas citri., Teixeira RD, Guzzo CR, Arevalo SJ, Andrade MO, Abrahao J, de Souza RF, Farah CS, J Biol Chem. 2018 Jul 6;293(27):10767-10781. doi: 10.1074/jbc.RA118.003475. Epub , 2018 May 4. PMID: 29728456

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