Source:http://linkedlifedata.com/resource/umls/id/C0001407
MSH: A purine base and a fundamental unit of ADENINE NUCLEOTIDES.,CSP: 6-aminopurine; one of the 5 major bases (with guanine, thymine, cytosine, and uracil) found in nucleic acids.,NCI: A chemical compound that is used to make one of the building blocks of DNA and RNA. It is also a part of many substances in the body that give energy to cells. Adenine is a type of purine.,NCI: A purine base and a fundamental unit of adenine nucleotides. (MeSH)