The start codon is the point at which a DNA sequence starts. It is important because a ribosome begins translating a sequence of RNA into amino acids.
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A start codon is important because it signals the beginning of translation in protein synthesis. It provides the information needed for the ribosome to initiate the assembly of the polypeptide chain. Without a start codon, translation cannot begin, and proteins essential for cell function would not be produced.
The start codon. The codon AUG is generally referred as the start codon because the translation of mRNA begins on AUG.
Every mRNA must begin with the start codon AUG, which codes for the amino acid methionine. This start codon marks the site where translation should begin on the mRNA molecule.
The codon that initiates transcription is the start codon "AUG", which also codes for the amino acid methionine.
ATG is the prominent start codon for most of the Eukaryotic proteins, other start codons such as CTG also exist in other species.
A tRNA carrying methionine pairs with the start codon AUG.