Tell your doctor if any of the following side effects become severe or don't go away: 1  Mild itching, burning, stinging, or tingling skin. 2  Redness or soreness. 3  Increased sensitivity to hot or cold temperatures. 4  Acne. 5  Muscle or back pain. 6  Headache. 7  Flu-like symptoms. 8  Runny or stuffy nose. 9  Nausea.
The Krebs cycle, which is also known as the citric acid cycle or tricarboxylic acid cycle, is part of a series of chemical reactions that organisms use to break food down into a form of energy that cells can use.
Step 1. In the first step of the citric acid cycle, acetyl CoA\text{CoA}CoAC, o, A joins with a four-carbon molecule, oxaloacetate, releasing the CoA\text{CoA}CoAC, o, A group and forming a six-carbon molecule called citrate. Step 2. In the second step, citrate is converted into its isomer, isocitrate.