A start codon is a specific sequence of nucleotides in mRNA that signals the beginning of translation. It typically codes for the amino acid methionine in eukaryotes and formyl-methionine in prokaryotes.
5 Must Know Facts For Your Next Test
The most common start codon is AUG.
It is essential for proper initiation of protein synthesis.
Mutations affecting the start codon can lead to severe disruptions in protein production.
In some rare cases, alternative start codons like GUG or UUG can be used in prokaryotes.
The start codon establishes the reading frame for the ribosome during translation.