Problem

Analyzing the energetics of coupled reactionsThe acyl-CoA synthetase reaction activates fa...

Analyzing the energetics of coupled reactions

The acyl-CoA synthetase reaction activates fatty acids for oxidation in cells:

R-COO- + CoASH + ATP →R-COSCoA + AMP + pyrophosphate

The reaction is driven forward in part by hydrolysis of ATP to AMP and pyrophosphate. However, pyrophosphate undergoes further cleavage to yield two phosphate anions. Discuss the energetics of this reaction both in the presence and absence of pyrophosphate cleavage.

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Solutions For Problems in Chapter 3