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Mixed inhibition

  1. Feb 17, 2016 #1
    1. The problem statement, all variables and given/known data
    I have this mixed inhibition, and knowing that it is a thermodynamic cycle i am asked to find the relation between the different Ki and Ks.
    https://scontent.xx.fbcdn.net/hphotos-xfp1/v/t35.0-12/12699252_1024216030972374_1605707906_o.jpg?oh=8b60ba8c953ea368fe8fc09af6fe5eaa&oe=56C77997
    2. Relevant equations


    3. The attempt at a solution
    I am not even sure to understand the question...
     
    Last edited: Feb 17, 2016
  2. jcsd
  3. Feb 17, 2016 #2

    epenguin

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    Look at the top line only. What is the equilibrium constant between E and ES?
    Well okay since you say you don't understand the question Ks = [E][ S]/[ES] = ?

    Now rub out to the arrows of the top line. Leave the others. What is the above-defined equilibrium constant equal to?

    Can these equilibrium constants be different?
     
  4. Feb 17, 2016 #3
    Between E and ES Ks=k-1/k1 Is it equal to k'-1/k'1=Ks' ?
     
  5. Feb 18, 2016 #4

    epenguin

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    In general no.

    Rub out to the arrows of the top line. Leave the others. In fact just write out the scheme again without the k1, k-1 steps. Can't you work out what that gives you for [E][ S]/[ES] ?
     
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