“This is the enzyme responsible for converting adenosine to inosine in the catabolism of the purines.”

“This creates a new ATP molecule, along with one of adenosine monophosphate.”

“Hypoxia increases central nervous system levels of specific neuroinhibitors such as endogenous opioids, adenosine, and gamma-aminobutyric acid.”

“The derivatives of purine are called adenine and guanine, and the derivatives of pyrimidine are called thymine, cytosine and uracil.”

“Causes and effects The structure of thalidomide is similar to that of the DNA purine bases adenine and guanine.”

“These bases are adenine, cytosine, guanine and thymine and can be represented as A, C, G, and T, respectively.”