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By R. W. Munn (auth.), P. I. Lazarev (eds.)

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High specificity means that the activation barriers ~Ft(ESt) = ~Ft(EPt) = F(E+S) - FESt F(E+P) - FEPt must also be high enough to limit the number of substrates to which the enzyme can complex. If only one or a few keys can fit into a keyhole the inevitable concomitant is that the chance of hitting the keyhole in an appropriate way through random collisions becomes small. This of course vitiates the whole point of catalysis, which is to lower activation energies and entropies. It is possible to obviate this conflict if the enzyme exhibits dynamic motions that actively draw the substrate in.

E. it possesses a monotonous exponential dependence on the corresponding potential difference (VI - Vz ). The most interesting feature of Equation (35) is the non-monotonous (VI - Vz ) dependence of the second bracketed term due to the nonlinear charge transfer effects in the three-body L--C--R system. e. the stationary state of C is mainly the state Cn' Let us assume, in addition, that the smallest energy electron transition involving C n is the Cn-Cn-I one. In this case one can retain only the term with W~ in the sum in Equation (35) and the terms with EL(n,nO) and EL(n - I,no) in the denominator of Equation (24).

Our calculation has shown dose electron energies in the self-consistent, 2S, and non-self-consistent, 2P, states. In the three-layer case the 2P state has a higher energy level than the 2S state. Since the dipole transfer to the IS state is only possible from the 2P state, the excited self-consistent 2S state can be expected to have larger lifetime in the three-layer model. 61 eV ("" 2000 nm) Le. it lies in the far infrared range. It might be interesting to experiment with a band which, being the polaron one, could only be identified by a preliminary estimation of the qualitative effects which pH, ionic strength and temperature produce on the properties of the 'polaron bands'.

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