UAA, UAG, and UGA do not code for an amino ackd. Translation stops when any of these codons is roached. Like arginine, most amino acids are specified by more than one codon. The genetic code Second letter of codon Phenylalarine uCu ucc UGu cysteine (Oys UGC UAU Tyrosine (Tyr) MAA Slop codon WAG Stop codon (Phe) Serine (Ser) UCA Leucine (Leu) UCG DEA Stop codon UGG Tryptophan irp CAU Histidine (His) CAC cu CGU Leucne (Lou cCA Proline (Pro) Arginine (Aig CUA CAA Gutamine (Gin) CAB CA ACU Isoloucine (Ile) ACC AAU Asparagine (Asn) ADU Serine (Ser) ABC AAC Threonine (Th) AUA ACA Methionine: ACB start codon AAA Lysine (Lys) AAG AGA Arginine (Arg AGG GAU Aspartic acki (Asp) GAC BGU Valne (Val) CA Alanine (Ala Glycine (Gy) GAA GAG GGA Glutamic acid (Gu) GGG How cells use the genetic code Gene DNA strand Transcription In transcription, the DNA MMA. sequence of a gene is usod to produce an MRNA molecule, MRNA strand Codon Codon Codon Translation Protein Phe Thr Gin In translallon, the genetic code is used lo determine the amino acid that corresponds to each codon. „.and the amino ackds are inked to one anolher at the ribosome to form the protein specitiod by the MRNA molocule. Third letter of codon [ き uopoo jo Joe S

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