The averaging process for helix model computation.

Abstract

<p>In this example the first helical curve <b>H</b>₁₄ is computed using the first quadruple of backbone atoms {<b>a</b>₁,<b>a</b>₂,<b>a</b>₃,<b>a</b>₄}, the second curve <b>H</b>₂₅ the next quadruple of atoms {<b>a</b>₂,<b>a</b>₃,<b>a</b>₄,<b>a</b>₅} and so on. For a pair of two consecutive interior atoms up to three slightly different curves could be computed. The final model curve for the segment between a pair of consecutive atoms is their average (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0129653#pone.0129653.e005" target="_blank">Eq 3</a>).</p