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com'plemen'tary base'



Genetics.
either of the nucleotide bases linked by a hydrogen bond on opposite strands of DNA or double-stranded RNA: guanine is the complementary base of cytosine, and adenine is the complementary base of thymine in DNA and of uracil in RNA. Cf. base pair.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

complementary anglecomplementary cells

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