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Table 3 Mean comparison (independent t test, two-tailed) between living fossil (LF) and radiated species (R), for each category of DNA repair genes and altogether (degrees of freedom, 42)

From: Evidence that DNA repair genes, a family of tumor suppressor genes, are associated with evolution rate and size of genomes

DNA repair gene category Species group Mean number Std. dev. [95% conf. interval] t value p value
Base excision repair (BER) 20 (LF) 16.75 3.274704 15.21739, 18.28261 − 2.7067 9.80 × 10 −3
24 (R) 18.92 1.976309 18.08214, 19.75119   
Conserved DNA damage response 20 (LF) 15.2 2.876401 13.8538, 16.5462 − 2.2001 3.34 × 10−2
24 (R) 16.83 2.03591 15.97364, 17.69302   
Direct reversal of damage 20 (LF) 2.9 0.3077935 2.755948, 3.044052 − 0.1872 0.8524
24 (R) 2.92 0.2823299 2.797449, 3.035884   
DNA polymerases 20 (LF) 14.3 1.688974 13.50954, 15.09046 − 2.4279 1.96 × 10−2
24 (R) 15.38 1.244553 14.84947, 15.90053   
Editing and processing nucleases 20 (LF) 6.5 1.100239 5.985072, 7.014928 − 2.4341 1.93 × 10−2
24 (R) 7.25 0.9440892 6.851346, 7.648654   
Fanconi anemia 20 (LF) 13.55 0.9445132 13.10795, 13.99205 − 2.2591 2.91 × 10−2
24 (R) 14.21 0.9770927 13.79574, 14.62092   
Homologous recombination 20 (LF) 21.2 2.261811 20.14144, 22.25856 − 1.6880 9.88 × 10−2
24 (R) 22.33 2.180281 21.41268, 23.25399   
Mismatch excision repair (MMR) 20 (LF) 8.35 0.8127277 7.969632, 8.730368 − 1.7706 8.39 × 10−2
24 (R) 8.79 0.8329709 8.439934, 9.143399   
Non-homologous end-joining 20 (LF) 6.55 0.6863327 6.228786, 6.871214 − 0.8497 0.4003
24 (R) 6.71 0.5500329 6.476075, 6.940592   
Nucleotide excision repair (NER) 20 (LF) 25.15 3.528456 23.49863, 26.80137 − 3.8043 5.00 × 10 −4
24 (R) 28.46 2.186503 27.53505, 29.38161   
All DNA repair genes 20 (LF) 130.45 14.56916 123.6314, 137.2686 −2.9417 5.30 × 10 −3
24 (R) 141.79 10.99003 137.151, 146.4324   
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