Sections of single-stranded DNA which have sequences that are palindromes, or which read the same both backwards and forwards, that may base pair with each other instead of with the correct sections of the other strand during renaturation into double-stranded DNA. This can lead to genetic errors and mutations.

From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.

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