Diarrhea is one of the most common causes. It can be caused by eating wrong kind of foods or by overeating. Consumption of contaminated food can lead to bacterial or viral infection in the stomach resulting in diarrhea and cramping of stomach.
Structural Biochemistry/ATP. Adenosine triphosphate (ATP) is a nucleotide that consists of an adenosine and a ribose linked to three sequential phosphoryl (-PO32-) groups via a phosphoester bond and two phosphoanhydride bonds. ATP is the most abundant nucleotide in the cell and the primary cellular energy currency in all life forms. The primary biological importance of ATP rests in the large amount of free energy released during its hydrolysis.
Coenzyme Q functions as a mobile electron carrier within the mitochondrial inner membrane. Its role in transmembrane H+ transport coupled to electron transfer (the Q Cycle) will be discussed in the section on oxidative phosphorylation.