0 a set of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule
1 a group of three chemical substances in DNA that contains the information for one of the amino acids, which are necessary for making protein (= substance necessary for the body to grow)
This analysis helped to locate the position of the translation start codon more precisely.
Finally, all 38 isolates encoded isoleucine at codon 356.
Thus, the third codon position was excluded from further analysis.
Conversely, according to the selective model, recombination should improve the efficacy of selection against all non-optimal codons.
Hence, there is no evidence that recombination increases the efficacy of selection against non-optimal codons.
For these comparisons, analyses were effected on the alignment including all codon positions.
Finally, the fragment including the putative initiation codon was obtained and sequenced.
The second difficulty is the way to define the contribution of each codon to the fitness of a genome.
