Dictionary of Human Evolution and Biology

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  Discrete structural unit within either
(1) a chromosome, or
(2) the amino acid sequence of a protein. Protein domains are modular units characterized by specific molecular sizes, configurations, molecular behaviors or functions. Aka molecular motif.

Cf. CpG island.

See conserved domain.

  Highest taxonomic entity, above the Kingdom; three Domains exist, the Bacteria, the Archaea, and the Eukara.

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