Figure 11.

Dependence of ^2hJ_NN(capped) on inter-nitrogen distance as approximated by the Fermi contact contribution to coupling.⁷ The equation is ^2hJ_NN (Hz) = 795579 exp(−3.9868 d), where d is the inter-nitrogen distance in angstroms.⁷ The red dashed lines bracket the values measured in this work. The green dashed line indicates the ^2hJ_NN(capped) predicted for the solvent-exposed cap of AR proteins. The blue dashed line indicates the value reported for the His24–His119 pair of apomyoglobin.¹⁷ The optimized histogram⁴⁹ (right ordinate) is for 803 nonredundant i-to-i–2 and i-to-i+3 distances of <3.2 Å obtained from the PDB survey.