Now imagine that only the Cu center was replaced by Zn(II). What would you expect to happen to the catalytic activity of this model complex? Briefly explain. A friend suggests that Cl, would be a much better terminal acceptor than O2 to be used in f) respiration because it has a reduction potential of 1.5 V. Do you agree with your friend? Why do you think aerobic organisms don’t use Cl2 in respiration?

Biochemistry
6th Edition
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Reginald H. Garrett, Charles M. Grisham
Chapter20: Electron Transport And Oxidative Phosphorylation
Section: Chapter Questions
Problem 21P
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Remember the model complex by Collman et al. for the
cytochrome c oxidase (CcO) active site attached to a gold
electrode (see Figure). Like Cco, this complex is capable of
carrying out the 4-electron reduction of dioxygen to water
under constant electron flux (with the possible formation of
hydrogen peroxide as an intermediate).
Me
HỒ
HN
NH
NH
EN-
N
Transcribed Image Text:Remember the model complex by Collman et al. for the cytochrome c oxidase (CcO) active site attached to a gold electrode (see Figure). Like Cco, this complex is capable of carrying out the 4-electron reduction of dioxygen to water under constant electron flux (with the possible formation of hydrogen peroxide as an intermediate). Me HỒ HN NH NH EN- N
Now imagine that only the Cu center was replaced by Zn(II). What would you expect to
c)
happen to the catalytic activity of this model complex? Briefly explain.
A friend suggests that Cl, would be a much better terminal acceptor than O, to be used in
f)
respiration because it has a reduction potential of 1.5 V. Do you agree with your friend? Why do you
think aerobic organisms don't use Cl2 in respiration?
Transcribed Image Text:Now imagine that only the Cu center was replaced by Zn(II). What would you expect to c) happen to the catalytic activity of this model complex? Briefly explain. A friend suggests that Cl, would be a much better terminal acceptor than O, to be used in f) respiration because it has a reduction potential of 1.5 V. Do you agree with your friend? Why do you think aerobic organisms don't use Cl2 in respiration?
Expert Solution
Step 1

Cytochromes c oxidase: This complex is seen in Mitochondria during the oxidative phosphorylation process.

This transfer of a proton from the mitochondrial matrix to the inner membrane of mitochondria and reduction of electron carrier and reduction of oxygen to water

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