guanine

(symbol: G) n. a purine compound in the nucleotides of living organisms. It is one of the four bases in DNA and RNA constituting the genetic code, the others being adenine, cytosine, and thymine or uracil.

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Psychology term of the day

May 8th 2024

peptide

n. a short chain of amino acids linked by peptide bonds. Peptides are usually identified by the number of amino acids in the chain. For example, dipeptides have two amino acids, tripeptides three, tetrapeptides four, and so on. See also polypeptide; protein.