alpha braid

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 27 July 09:46   

    alpha helix

    # A begin in some s, area the s are abiding in a coil, or , with about no chargeless amplitude on the and all s getting acicular appear the .

    # Alpha helices in active bacilli accept a right-handed geometry, because of the different of the accustomed s.

    # The s of anniversary in a alpha are ? = -57 and ? = -47.

    # The repeating assemblage of a follows the n_r , area n = amount of residues per about-face and r = amount of atoms in ring formed by a hydrogen band and the articulation of capital alternation abutting its extremities. An alpha braid is 3.6_13. The first alpha circling balance is taken as the first balance whose courage carbonyl accumulation (C=O) is consistently hydrogen affirmed (...) to the amide hydrogen (N-H) forth the helix, such that C=0...H-N. Correspondingly, the endure circling balance is the endure whose courage amide hydrogen is consistently hydrogen affirmed to the courage carbonyl oxygen forth the helix. Appropriately in an alpha helix, the ith residues carbonyl oxygen forms a hydrogen band with the ith + 4 residues amide hydrogen in the polypeptide sequence. If this arrangement is torn the braid is broken, and aberrant hydrogen-bonding arrange are not advised allotment of an alpha helix.



Tags: alpha, backbone, hydrogen

 helix, alpha, hydrogen, amide, carbonyl, backbone, residue, residues, , alpha helix, amide hydrogen, regularly hydrogen bonded, helix alpha helix, alpha helix alpha,

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Article In : Reference & Education  -  Chemistry