All-or-none process

Calorimetric (DSC) measurements yield thermodynamic properties of duplex melting in these oligonucleotides independent of any assumptions concerning the model of melting, such as a cooperative all-or-none process versus a noncooperative, multiple-stage melting process. Comparison of calorimetric enthalpies with van t Hoff enthalpies obtained either from the manipulation of heat capacity curves outlined in equations (16.19) to (16.22), or from optical or NMR measurements [equations (16.14) to (16.17)] allows conclusions to be drawn concerning the size of the cooperative unit. If the two... 

More intriguing is the fact that the parathormone secretion occurs in the absence of dopamine what dopamine is doing, is to enhance a phenomenon already present this is also at variance with the normal physiological response to a neurotransmitter which is generally an all or none process. 

Protein folding and unfolding is thus largely an "all or none"process that results horn a cooperative transition. For example, suppose that a protein is placed in conditions under which some part of the protein structure is thermodynamically unstable. As this part of the folded structure is disrupted, the interactions between it and the remainder of the protein will be lost. The loss of these interactions, in turn, will destabilize the remainder of the structure. Thus, conditions that lead to the disruption of any part of a protein structure are likely to unravel the protein completely. The structural properties of proteins provide a clear rationale for the cooperative transition. 

Give evidence that protein folding appears to be a cooperative transition, and explain why that means it is an all or none process. 

However,/b can only be calculated from Equation (4-65) when TV is small. For an all-or-none process, 1 / a 1 or a > 1 (see above). If the probabilities for the conformational transitions are the same for all conformations, then the probability per chain must increase with increasing N. Thus, for the chain transition probability, the product of N and must be considered. The condition for Equation (4-65) is thus... 

Bgure 9.31 for qnenching of NATA by aciytamide. The FD data could not be explainol by the RBC model but were consistent with the DDQ model. This indicates that the quenching rate displays an exponential dependence on distance and that quendiing is not an all-or-none process that occurs only at the contact distance. 

In a complex environment, checklists help us deal with two basic issues the fallibility of human memory and attention, especially when it comes to mundane routine matters that are easily overlooked under the strain of more pressing events. Faulty memory and distraction are a particular danger in what engineers call all-or-none processes. If you miss one key thing you might as well not have made the effort at all ... 

However, can only be calculated from equation (4-67) when N is small. For an all-or-none process, 1/g 1 or g > 1 (see above). If the prob-... 

The mass action model of micellization assumes that the cationic micelle, MP ", is foraed by an all-or-none process from N monomers, D" ", and N-P firmly bound anions, X . 

It is clear from the results presented in Section II that the processes of formation regression of basal bodies and flagella are sequential, and not all-or-none processes. The chance of observing particular stages depends on the synchrony with which they occur throughout the popu-... 

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