2WWV:
reference: NMR structure of cysteinyl-phosphorylated enzyme IIB of the N,N'-diacetylchitobiose-specific phosphoenolpyruvate-dependent phosphotransferase system of Escherichia coli., Ab E, Schuurman-Wolters GK, Nijlant D, Dijkstra K, Saier MH, Robillard GT, Scheek RM, J Mol Biol. 2001 May 18;308(5):993-1009. PMID: 11352587

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