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Terminal five residues of PerCter required for MREG binding. Shown is an overlay of sensorgrams showing the interaction of wild-type PerCter and five PerCter mutants, HisPerCterΔ346, HisPerCterΔ345–346,HisPerCterΔ344–346,HisPerCterΔ343–346,andHisPerCterΔ342–346 with immobilized MREG. Data points were collected every 0.2 s.
