- A sequence of amino acids in a polypeptide or of nucleotides in DNA or RNA that is similar across multiple species. A known set of conserved sequences is represented by a consensus sequence. Amino acid motifs are often composed of conserved sequences.
Definition from: MeSH via Unified Medical Language System at the National Library of Medicine
- A base sequence in a DNA molecule (or an amino acid sequence in a protein) that has remained essentially unchanged throughout evolution.
Definition from: Human Genome Project Information
at the U.S. Department of Energy
See also Understanding Medical Terminology.