A kind of dimer, or something made up of two parts, in which the two parts are identical.

Occurs quite frequently in nature, as a number of proteins, nucleic acids, lipids, and polysaccharides are composed of two or more identical components.

See also heterodimer, oligomer, polymer, monomer. The prefix hetero can be used with oligomer and polymer to denote whether their constituents are identical or not.

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