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Kaplan Qbank USMLE



Author5 Posts
  #1

whats the rate limiting step in ketone synthesis and the next enzyme after the rate limiting step

in ketone synthesis?


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  #2

i think:

[in the FASTING LIVER mitochondria]

Fatty Acid CoA ->->->->Acetyl CoA->(HMG CoA SYNTHASE)-> HMG CoA ->(HMG CoA REDUCTASE)-> Acetoacetate -> 3-Hydroxybuterate (and Acetone)


if this correct - then i think HMG CoA Synthase is the RLE.

please correct if wrong.


  #3

correct, but whats the step after rate limiting step?

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  #4

the next step is turning the HMG co A to Acetoacetate by the action of the Enzyme " HMG co A lyase"

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  #5

good!

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