"Loyalty, got royalty inside my ___" (Kendrick Lamar) (3)

I believe the answer is:

dna

(Other definitions for dna that I've seen before include "It carries genetic information" , "Genetic profile" , "Bodily substance that stores genetic information - police use it to identify" , "Substance that stores genetic information in body" , "Initially, it stores genetic information" .)

I've seen this clue in the Universal.

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