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Unformatted text preview: new termination codon. e. Sequence 5) has an additional A after the seventh base. This addition changes the third codon and the codons that follow, because it changes the reading frame (the way that bases fit into codons). Thus it changes all the corresponding amino acids. Note that the deletion of one (or two) base would have the same effect. 4. The mRNA would have the following sequence, which bases above and below one another represent alternatives. AUG GCU CCU CCU UUA UGG AUG GGU . .. A A A A A G G G CUU G C C C A C G C The total degeneracy is quantified by the number of possible mRNAs, which in this case is 4x4x4x6x4=1536. Any mRNA with one of the possible sequences would give the appropriate amino acid sequence and would be a real mRNA...
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This note was uploaded on 06/18/2010 for the course BIS 103 taught by Professor Abel during the Spring '08 term at UC Davis.
- Spring '08