stop codon


a: stop codon ~
b: period at the end of a sentence.


Or for the British out there a full stop. Or from the linked page:

"A nonsense mutation is a point mutation that introduces a premature stop codon into the part of the gene that encodes a protein. A stop codon is like a period at the end of a sentence: it instructs the ribosome to stop making the protein. So if a mutation leads to an early stop codon, only part of the protein will be made. 'Half-baked' proteins that result from nonsense mutations are often nonfunctional or defective."

Writer: Katy Metzler
Date: Aug 7 2014 5:08 PM

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