1·The fibrous vertebrate bodies, polypeptide chain, is arguably the most plentif

Question

1·The fibrous vertebrate bodies, polypeptide chain, is arguably the most plentiful protein helix structure in the body. The a-colla which is left-handed, is composed of a repeating sequence of gly-X-pro or gly-X-4-hyp, and has an axial connective tissue protein collagen makes up about one-third of the dry protein weight of the basic secondary structure assumed by an a-collagen gen helix so the a-collagen helix, - translation of 0.29 nm and an angular rotation of 1099 I. How many residues are in one complete turn of the a-collagen helix? 2. What is the pitch (rise) of one complete turn of the a-collagen helix?

Explanation / Answer

1. Number of residues per turn = complete degree of rotation / angular rotation = 360 / 109 = 3.3

2. Pitch of one complete turn = axial translation × number of residues per turn = 3.3 × 0.29 = 0.95nm

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