Anticodons are located on transfer RNA (tRNA) molecules, specifically in a region called the anticodon loop near the middle of the tRNA structure. They are not found on mRNA or DNA; instead, each tRNA carries an anticodon that pairs with a complementary codon on mRNA during translation.

Quick Scoop

  • Anticodons are triplets of nucleotides found on tRNA, not on mRNA.
  • They sit in a special anticodon loop roughly opposite the amino acid attachment site on the tRNA “L-shaped” structure.
  • During protein synthesis, the anticodon loop of tRNA fits into the ribosome, where the anticodon base-pairs with a codon on mRNA to ensure the correct amino acid is added to the growing polypeptide chain.

Where exactly are anticodons?

  • On the tRNA molecule, in the anticodon loop , which is one of several loops in the cloverleaf secondary structure of tRNA.
  • In three-dimensional space, this loop is positioned at one end of the tRNA’s L-shape, opposite the 3′ end where the corresponding amino acid is attached.

Why does their location matter?

  • Because the anticodon loop must physically reach into the ribosome’s decoding site, its position on tRNA lets it align precisely with the mRNA codon during translation.
  • This spatial arrangement allows each tRNA to act as a bridge between an mRNA codon and its specific amino acid, maintaining accuracy in the genetic code’s translation.

Information gathered from public forums or data available on the internet and portrayed here.