Computer model with rotated residues

A computer model of the active hexa (E-D-glucopyranosyl)-D-glucitol with rotated residues was superimposed on a model of three base paired nucleotides constructed according to parameters consistent... 

Figure 3. Computer model of the elicitor with rotated residues forming anchors bound to a model of DNA nucleotides (top). The abbreviations are Ad, adenine Dr, deoxyribose HB, hydrogen bonding site P, phosphorus and Th, th)rmine. The top strand of the segment of model DNA is oriented 3 dTdTdT-5, left to right and the bottom strand orientation is 5 -dAdAdA-3, left to right.

The measurement of the dipole moments of copolymers and its analysis in terms of both sequence distribution and local chain configurations has received attention Modern computer aided analytical procedures provide in ght into the dependence of mean square dipole moment per residue on reactivity ratios, polymer composition and rotamer probabilities. One such calculation for atactic cc ly-(p-chlorostyrene-p-methylstyrene) has shovm that at constant composition, the dipole moment is quite sensitive to the sequence distribution and thus to the reactivity ratios. This dependence would be even more marked for syndiotactic chains. For cop61y(propylene-vinyl chloride) and copoly(ethylene-vinyl chloride) d le moments are again very sequence dependent, much more so than the diaracteristk ratio. It would appear that in copolymer systems dielectric measurements can be a powerful method of investigating sequence distributions. Two copolymers, p-dilcxo-styrene with styrene and with p-methylstyrene have been examined experimentally The meamrements were made on solid amorphous samples above the ass-rubber transition temperature (Tg) and they are consistent with the predictions of the rotational isomeric state model udi known reactivity ratios and rea nable replication probabilities . However, it is the view of this author that deduc-... 

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