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in·vert·ed re·peat(in-vert'ĕd rē-pēt'),
A sequence of nucleotides that is repeated nearly without change except in the opposite direction, usually at some point distant from the original sequence; often associated with gene insertion.
inverted repeat (IR)a short sequence in a duplex DNA molecule which is repeated in the reverse orientation, either immediately adjacent or after an intervening sequence
blocks of nucleotide sequence that are present in more than one copy, but in a reverse order, such as ABCDE and E,D,C,B,A,; they may be terminal or internal. Called also indirect repeat. See also palindrome.