4EUV:
reference: Structures of the PelD Cyclic Diguanylate Effector Involved in Pellicle Formation in Pseudomonas aeruginosa PAO1., Li Z, Chen JH, Hao Y, Nair SK, J Biol Chem. 2012 Aug 31;287(36):30191-204. Epub 2012 Jul 17. PMID: 22810222

This OCA Structure page
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