👉 The term "purine" refers to a group of 10 amino acids that are essential for the synthesis of proteins and is composed of two nitrogen bases, threonine (C5H9NO2) and pyrrolidine (C6H7O2N). These purines are involved in many cellular processes, including DNA replication, cell division, and protein synthesis. The term "purine" is often used to refer to the purine nucleoside diph