nucleic acid base

nu·cle·ic ac·id base

a purine or pyrimidine; found in naturally occurring nucleic acids such as DNA.
References in periodicals archive ?
Two chemists now argue that tarlike organic polymers in the oceans could have provided an ancient sunscreen for the amino acids and nucleic acid bases forming there.
The idea that there is a code for the interaction of proteins and nucleic acids makes a lot of sense, as does the notion of a stereochemical relationship between proteins, amino acids, and nucleic acid bases.
ADVR's lead product, AVR118 (formerly known as Product R), represents a complex mixture of peptides, amino acids, nucleosides, nucleotides and nucleic acid bases that possesses, among other things, immunomodulatory activity.