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. Author manuscript; available in PMC: 2014 Jan 24.
Published in final edited form as: J Phys Chem B. 2013 Jan 10;117(3):859–867. doi: 10.1021/jp311116p

Figure 7. Variation of backbone amide-15N CSA for different alpha-helix and beta sheet residues.

Figure 7

Panel A shows a variation of backbone amide-15N CSA obtained from quantum chemical calculations for residues present in different alpha-helices based on their closeness to the heme unit of cytb5. Residues of first alpha-helix (L14-H20) are situated at larger distance while second (E48-Q54), third (T60-D65) and fourth (T70-F79) alpha-helix residues are located above or below the plane of heme unit of cytb5.