Dictionary of Human Evolution and Biology

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MRNA

Messenger ribonucleic acid; the complementary strand of RNA transcribed from DNA and translated by tRNA at the ribosomes into peptides or polypeptides (proteins). Heterogenous mRNA (hmRNA) consists of a complementary copy of the DNA cistron, and contains both exons and introns, which are then edited. Aka template RNA, complementary RNA.

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From "Dictionary of Nursing and Individual Health Care"