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. 2015 Nov 2;54(46):6896–6908. doi: 10.1021/acs.biochem.5b01002

Figure 3.

Figure 3

Identification of the N–H···Nδ1 H-bond in CtrHb-CN. (A) 1H–15N HSQC (downfield amide 1H region). The minor heme isomer is denoted with a prime. (B) 1H–15N LR-HMQC (upfield 15N region). (C) 1H–15N LR-HMQC (downfield 15N region). (D) 1H–(N)–15Nδ1 COSY. (E) 1H-coupled 1Hε1–(Nδ1)–15N–(H) LR-COSY. (F) Ser76 N–H···Nδ1 His79 helix-capping scheme in C. eugametos CtrHb-CN. Correlated nuclei determined by the NMR data shown in panels D and E are highlighted with red and blue circles, respectively.