So this becomes our first codon and this is essentially the methionine molecule. Then we have CUC, then we have UCC, then we have Ugg and so forth. And so once we know that this is our first codon, the next triplet nucleotide sequence is codon number two. Then the next one is codon number three and so forth. Now, in eukaryotic cells, such as human cells, we have the methionine tRNA complex. So the transfer RNA molecule attached to that activated methionine molecule essentially reads our mRNA molecule.