Oligomers oligopeptides

These low-temperature amide V IR and VCD isotope-edited results could be modeled with near-quantitative accuracy with DFT parameters by transferring ab initio FF, APT, and AAT parameters from computations for an a -helical heptapeptide model compound onto an o -helical 20-mer oligopeptide (Fig. 8 left). This simulation does not agree with data for the C-terminally labeled oligomer, because experimentally that end of... 

The donor-acceptor distance may not be unique, especially when the donor and acceptor are linked by a flexible chain (e.g. end-labeled oligomers of polymethylene or polyethylene oxide, oligopeptides, oligonucleotides, polymer chains). 

All peptide-catalyzed enone epoxidations described so far were performed using insoluble, statistically polymerized materials (neat or on solid supports). One can, on the other hand, envisage (i) generation of solubilized poly-amino acids by attachment to polyethylene glycols (PEG) and (ii) selective construction of amino acid oligomers by standard peptide synthesis-linked to a solid support, to a soluble PEG, or neat as a well-defined oligopeptide. Both approaches have been used. The former affords synthetically useful and soluble catalysts with the interesting feature that the materials can be kept in membrane reactors for continuously oper-... 

When starting from chiral non-racemic mixtures of 3 7 and 4 6 L/D compositions, the short oligopeptides generated are rich in heterochiral di-astereoisomers, whereas the longer oligomers are rich with oligopeptides of... 

The sub-division size ( low molecular weight compound , oligomer and polymer ) is self-explanatory but also not without difficulties. This arises primarily from the uncertainty assodated with the term oligomer and indeed it is perhaps not appropriate to be too spedfic here. In general however a low molecular weight compound is a molecule without any repetitive structural aspects, an oligomer is a molecule where certain structural components are repeated a number of times, e.g. oligopeptide, tetraporphyrin etc. A polymer is... 

N-terminal amino acid (p. 973) oligomer (p. 993) oligopeptide (p. 959) paper chromatography (p. 969)... 

Oligomers Oligonucleotides Oligopeptides Oligosaccharides 10 -10 2 Less than 10 Nucleotides a-Amino acids monosaccharides... 

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