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Table 7 Relative fitness and selection coefficient of the 16 dinucleotides when their first base was chosen every 12 sites and their second one was chosen 12 sites downstream

From: The structure of selective dinucleotide interactions and periodicities in D melanogaster mtDNA

Pair Expected Observed Con χ29 R Fitness RSC
A-A 292.4 305 0.5447 1.04 + 0.04
A-T 265.2 285 1.4750 1.07 + 0.07
A-G 58.6 44 3.6205 0.75 - 0.25
A-C 73.8 56 4.3092 0.76 - 0.24
T-A 264.4 281 1.0405 1.06 + 0.06
T-T 239.9 230 0.4047 0.96 - 0.04
T-G 53.0 49 0.2960 0.92 - 0.08
T-C 66.8 64 0.1153 0.96 - 0.04
G-A 58.5 36 8.6389 0.62 - 0.38
G-T 53.0 53 0.0000 1.00 - 0.00
G-G 11.7 25 15.0754 2.14 + 1.14
G-C 14.8 24 5.7720 1.62 + 0.62
C-A 73.7 67 0.6144 0.91 - 0.09
C-T 66.9 57 1.4601 0.85 - 0.15
C-G 14.8 20 1.8540 1.35 + 0.35
C-C 18.6 30 6.9552 1.61 + 0.61
Total 1626.1 1626 52.1761   
  1. Con = χ21 contribution to; R fitness = relative fitness obtained by Observed/Expected (where expected fitness = 1); RSC = relative selection coefficient (R Fitness – 1).