Figure 37.

Visualization of the spin density in a folded protein, PDB 6EKA, the β solenoid HELL-F. The first panel shows side-chains of a protein monomer (two layers in the β solenoid). The next panels depict spins within 4–10 Å of a β proton located in the core of the structure. Spins in b−f are colored white for protons, gray for carbon, blue for nitrogen, red for oxygen, and yellow for sulfur. Numbers in gray, black, and blue indicate the number of proton, carbon, and nitrogen spins, respectively, within the given distance.