Histidine is an amino acid that is coded by specific mRNA codons in the genetic code. The mRNA codons that correspond to histidine are CAU and CAC. This means that when the ribosome encounters these codons during translation, it will incorporate histidine into the growing polypeptide chain.
Understanding the codons for each amino acid is crucial for molecular biology and genetics, as it helps researchers and students comprehend how proteins are synthesized from genetic information. In summary, whenever you see the codons CAU or CAC in mRNA, you can identify that they are signals for adding histidine to a protein sequence.