1A54:
reference: Crystal structure of phosphate binding protein labeled with a coumarin fluorophore, a probe for inorganic phosphate., Hirshberg M, Henrick K, Haire LL, Vasisht N, Brune M, Corrie JE, Webb MR, Biochemistry 1998 Jul 21;37(29):10381-5. PMID: 9671506

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