Pitch of a helix

FIGURE 9-14 Schematic diagram illustrating the pitch of a helix. 

The ot-helix structure repeats after exactly 18 residues, which amounts to 5 turns. It has, therefore, 3.6 residues per turn. Since the pitch of a helix is given by p = nh, we have for the ot helix, with a rise of... 

The pitch of a helix is the distance required for the helix to make a full turn. The average pitch of an a helix (Figure 16.21) is 5.4 A. Assuming this pitch is... 

---