4MXL:
reference: Spectroscopic and Computational Study of a Nonheme Iron Nitrosyl Center in a Biosynthetic Model of Nitric Oxide Reductase., Chakraborty S, Reed J, Ross M, Nilges MJ, Petrik ID, Ghosh S, Hammes-Schiffer S, Sage JT, Zhang Y, Schulz CE, Lu Y, Angew Chem Int Ed Engl. 2014 Jan 31. doi: 10.1002/anie.201308431. PMID: 24481708

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