Propagation Proteins, also

The above classification of polymers according to polymerization mechanism, as shown by the variation of molecular weight with conversion [Figs. 1.2(a) and 1.2(b)], is not without its ambiguities. Certain polymerizations show a linear increase of molecular weight with conversion [Fig. 1.2(c)] when the polymerization mechanism deviates from the normal chain or step pathway. This is observed in certain ionic chain polymerizations, which involve a fast initiation process coupled with the absence of reactions that terminate the propagating reactive centers. Biological syntheses of proteins also show the behavior described by Fig. 1.2(c) because the various... 

The protein folding process and its determining factors are still poorly understood. But even if all factors could be modeled appropriately, folding simulations can span only a tiny fraction of the actual time required to fold a protein which is on the order of milliseconds to seconds. In addition, the contributing factors need to be modeled extremely accurately in order to avoid error propagation during the vast amount of computation needed for completely folding a protein. Also the structure prediction problem appears to be difficult [172-174]. 

The idea of a protein-based genetic element has profound implications not only for our understanding of human diseases thought to arise from similar self-propagating protein misfolding events but also for an... 

Not all influences on, or potentials recorded from, a neuron have the same time-course as the EPSP and IPSP, which follow the rapid opening of Na+ and Cl ion charmels directly linked to NT receptors. There are also slowly developing, longer lasting and smaller non-propagated (conditioning) changes in potential most of which appear to have a biochemical intermediary in the form of G-proteins linked to the activation (Gs) or... 

---