Polypeptide charge distribution

Cong Y, Yang ZZ (2000) General atom-bond electronegativity equalization method and its application in prediction of charge distributions in polypeptide. Chem Phys Lett 316(3-4) 324-329... 

Price, S. L., C. H. Faerman, and C. W. Murray. 1991. Toward Accurate Transferable Electrostatic Models for Polypeptides A Distributed Multipole Study of Blocked Amino Acid Residue Charge Distributions. J. Comput. Chem. 12,1187-1197. 

D. Poland and H. A. Scheraga, Biochemistry, 6,3791 (1967). Energy Parameters in Polypeptides. 1. Charge Distributions and the Hydrogen Bond. 

The reduction of the solute charge distribution to a set of fixed point charges makes it possible the application of the FD method to the study of large molecules, such as polypeptides or proteins. 

In refs. 4 and 5, we reported that the effects of Dy on the saturation of Signal II were significantly larger than those of Dy-EDTA and that the removal of the peripheral polypeptides increased the accessibility of these relaxing agents to D . The changes in jP 2/2 Dy-HEDTA are compared with those by Dy " " and Dy-EDTA in Table 1. The effectiveness of Dy-HEDTA was intermediate between those of Dy and Dy-EDTA". This shows that the accessibility of Dy " " and Dy-EDTA is affected by the surface charge distribution on PS II as well as by the... 

Vanin et al. studied order proflles of the perdeuterated laurate chain in chiral and achiral phases by means of deuterium NMR. The quadrupole splittings measured for the sequence of CD2 moieties are all quite similar for the nematic and chiral nematic phase the conclusion was that chiral distortions of the micellar shape must be very small. Their proposal for the mechanism behind the phase chirality is analogous to the one for polypeptides an asymmetric point charge distribution which in this case was speculated to be created by the chiral dopant on the micellar surface [19]. Radley and Tracey prepared samples from a racemic detergent and observed high fluidity, whereas those consisting of some enantiomeric excess showed a significantly increased viscosity [30]. But this is no proof for the association of micelles to necklaces. 

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