1PY0:
reference: A caged lanthanide complex as a paramagnetic shift agent for protein NMR., Prudencio M, Rohovec J, Peters JA, Tocheva E, Boulanger MJ, Murphy ME, Hupkes HJ, Kosters W, Impagliazzo A, Ubbink M, Chemistry 2004 Jul 5;10(13):3252-60. PMID: 15224334

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