Mutational and Selective Pressures on Codon and Amino Acid Usage in Buchnera, Endosymbiotic Bacteria of Aphids

Table 1.

Percentage of AT at the Different Codon Positions for All CDs, %AT of Intergenic Spacers ≥50 bp in the Three Symbionts and in Their Unambigous Orthologs in E. coli K-12 MG1255, and Average AT and GC Skews at the Third Codon Position, for Leading and Lagging Strands




%AT12

%AT3

%ATintergenic

AT3 skew

GC3 skew

N
Mean
SD
Mean
SD
Man
SD
Leader
Lagger
Leader
Lagger
Buchnera-Aps 564 66.2 5.4 85.5 2.6 84.8 4.6 −0.06 0.04 0.18 0.02
Buchnera-Sgr 545 67.0 5.6 87.2 2.4 85.8 4.6 −0.07 0.06 0.24 0.05
Buchnera-Bpi 504 64.7 4.6 84.9 2.6 84.3 3.7 −0.10 0.11 0.33 −0.47
E. coli K12 MG1655
597
49.2
3.2
43.7
6.2
57.0
7.1
−0.20
−0.17
0.01
−0.02

This Article

  1. Genome Res. 14: 44-53

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