1QR5:
reference: 15N and 1H NMR study of histidine containing protein (HPr) from Staphylococcus carnosus at high pressure., Kalbitzer HR, Gorler A, Li H, Dubovskii PV, Hengstenberg W, Kowolik C, Yamada H, Akasaka K, Protein Sci 2000 Apr;9(4):693-703. PMID: 10794411

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