A stone's throw and its launch window: timing precision and its implications for language and hominid brains |
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Authors: | W H Calvin |
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Affiliation: | Chemistry Department, Pratt Institute, Brooklyn, New York 11205, U.S.A. |
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Abstract: | The Chou-Fasman conformational parameters, P, for amino acid residues in proteins are shown to be a linear function of intermolecular force and steric parameters. For α- helix, coil and turn parameters, steric effects are predominant; whereas for β-sheet parameters, intramolecular forces are predominant. Turn and coil parameters show little or no difference in their dependence which is different from that of α-helix and in some ways almost reciprocal. Factors which increase the probability of finding an amino acid residue in an α-helix usually decrease the probability of finding it in coil or turn. Values of P were calculated for several of the less common amino acids. |
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