Stop codon

What Kind of Doctor Do I Need? Slideshow

Medical Definition of Stop codon

Stop codon: A set of three adjacent bases in the DNA or their complementary bases in messenger RNA that specifies the end of a polypeptide chain.

The three stop codons (in messenger RNA) are UAA, UAG, and UGA. They are also called termination codons or nonsense codons.

U = uracil; A = adenine; G = guanine.


Subscribe to MedicineNet's General Health Newsletter

By clicking Submit, I agree to the MedicineNet's Terms & Conditions & Privacy Policy and understand that I may opt out of MedicineNet's subscriptions at any time.

Reviewed on 9/14/2016

Health Solutions From Our Sponsors