Molecule that can be supercoiled (3)

I believe the answer is:

dna

(Other definitions for dna that I've seen before include "Substance that stores genetic information in body" , "Double-helix molecule (abbr.)" , "Initially, it stores genetic information" , "Briefly, substance in chromosomes used by police to identify criminals" , "Genetic profile" .)

I've seen this clue in the Universal.

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