The PDH complex is a logical point of regulation in metabolism, as it links two major catabolic processes. Answer the following regarding the complex: a) Explain the advantage of E1, E2 and E3 working as a complex as opposed to separately. b) Explain the purpose of each of the three enzymes and their associated cofactors. c) NADH can inhibit the PDH complex directly or indirectly. What is the purpose of inhibition by NADH? d) Explain the differences between direct and indirect inhibition by NADH. Be sure to indicate the components involved and the mechanism of inhibition (impact on target component).

Biochemistry
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ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
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Chapter1: Biochemistry: An Evolving Science
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The PDH complex is a logical point of regulation in metabolism, as it links two major
catabolic processes. Answer the following regarding the complex:
a) Explain the advantage of E1, E2 and E3 working as a complex as opposed to
separately.
b) Explain the purpose of each of the three enzymes and their associated cofactors.
c) NADH can inhibit the PDH complex directly or indirectly. What is the purpose of
inhibition by NADH?
d) Explain the differences between direct and indirect inhibition by NADH. Be sure
to indicate the components involved and the mechanism of inhibition (impact on
target component).
Transcribed Image Text:The PDH complex is a logical point of regulation in metabolism, as it links two major catabolic processes. Answer the following regarding the complex: a) Explain the advantage of E1, E2 and E3 working as a complex as opposed to separately. b) Explain the purpose of each of the three enzymes and their associated cofactors. c) NADH can inhibit the PDH complex directly or indirectly. What is the purpose of inhibition by NADH? d) Explain the differences between direct and indirect inhibition by NADH. Be sure to indicate the components involved and the mechanism of inhibition (impact on target component).
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