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20emmanuelg1030
13.09.2019 •
Biology
Identify all the amino acid-specifying codons where a point mutation (a single base change) could generate a nonsense codon.
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Ответ:
Glutamic Acid (Glu): codons GAA, GAG
Glutamine (Gln): codons CAA, CAG.
Lysine (Lys): codons AAA, AAG, UCG
Serine (Ser): codons UCA, UCG
Leucine (Leu): codons UUG, UUA
Tyrosine (Tyr): codons UAC, UAU
Tryoptophan (Trp): codon UGG
Arginine (Arg): codons CGA, AGA
Glycine (Gly): codon GGA
Cysteine (Cys): codon UGU
Explanation:
Non sense codons are: UAA, UAG, UGA. Then following the genetic code (see attached file) a single base substitution in any of the codons indicated in the answer could generate a stop codon. This single base substitution might happen in the first, second or third base of the codon.
Ответ: