So the star codon is the nucleotide sequence aug, where a is the atom nucleotide, u is the uracil nucleotide, and g is the guanine or the guanosine nucleotide. Now, once our small subunit finds the star codon, it basically signals a tRNA molecule to go out and find the appropriate amino acid, which is the methionine amino acid. The tRNA then binds to our amino acid, and we form the amino acid tRNA complex. So basically, our tRNA molecule that is bound to our amino acid is known as the amino acid tRNA or the charged tRNA. And when somebody says it's an uncharged tRNA, that means the tRNA is no longer bound to our amino acid. So once our tRNA finds the methionine amino acid, it then brings that methionine amino acid to our mRNA molecule, and the tRNA binds to our mRNA molecule.