Bulge Ex

5-nucleotide bulge.

A bulge is a region of unpaired bases with two adjoining stacks. In a bulge, the unpaired bases are only found on one side of the molecule. This differs from an internal loop, where unpaired bases are found on both sides.


Bulges are typically described by the number of unpaired bases. In the illustration to the right, 5 bases are unpaired.

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