An inverted repeat (or IR) is a sequence of nucleotides that is the reversed complement of another sequence further downstream.
For example, 5'---GACTGC....GCAGTC---3'. When no nucleotides intervene between the sequence and its downstream complement, it is called a palindrome. Inverted repeats define the boundaries in transposons. Inverted repeats also indicate regions capable of self-complementary base pairing (regions within a single sequence which can base pair with each other).
Read more about Inverted Repeat: Examples
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