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Evans PD, Jaseja M, Jeeves M, Hyde EI (December 1996). "NMR studies of the Escherichia coli Trp repressor.trpRs operator complex". Eur. J. Biochem. 242 (3): 567–75. doi:10.1111/j.1432-1033.1996.0567r.x. PMID9022683.