Chapter 23.2, Problem 23.2PP

Interpretation Introduction

Interpretation:

The sequence of steps involved in $\text{β-oxidation}$ of butyryl CoA and the energy yield from the complete degradation of butyryl CoA via β-oxidation, the citric acid cycle, and oxidative phosphorylation has to be determined.

Concept Introduction:

$\text{β-oxidation}$ is essentially the process of degradation of fatty acid into two-carbon acetyl-CoA. In each cycle of $\text{β-oxidation}$ one fatty acid is converted to acetyl CoA and an acyl derivative of fatty acid with two carbons lesser than the initial fatty acid.

The energy yield in terms of ATP depends upon the number of molecules of ${\text{FADH}}_2$ and NADH produced in the entire $\text{β-oxidation}$ process of the saturated fatty acid. Each molecule of ${\text{FADH}}_2$ yields two ATP molecules. Each molecule of NADH yields three ATP molecules. Each citric acid cycle yields 3 NADH and 1 ${\text{FADH}}_2$ along with one GTP.