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Table 2 Events of gene losses in the P. furiosus, P. horikoshii and P. abyssi genomes

From: Molecular evolution of the hyperthermophilic archaea of the Pyrococcus genus: analysis of adaptation to different environmental conditions

Functional group Number of genes lost  
  P. horiko-shii P. abyssi P. furiosus p * (χ2)
INFORMATION STORAGE AND PROCESSING 9 2 10 0.066
Translation; ribosomal structure and biogenesis 1 1 3 0.449
Transcription 5 1 4 0.273
Replication; recombination and repair 3 0 3 0.223
CELLULAR PROCESSES AND SIGNALING 4 4 25 0.000002
Cell cycle control; cell division; chromosome partitioning 1 0 0 0.368
Defense mechanisms 1 1 5 0.102
Signal transduction mechanisms 1 1 11 0.0004
Cell wall/membrane/envelope biogenesis 1 0 4 0.074
Cell motility 0 0 3 0.05
Intracellular trafficking; secretion; vesicular transport 0 1 1 0.607
Posttranslational modification; protein turnover; chaperones 0 1 1 0.607
METABOLISM 34 9 21 0.0007
Energy production and conversion 11 1 5 0.011
Carbohydrate transport and metabolism 8 0 4 0.018
Amino acid transport and metabolism 3 1 0 0.174
Nucleotide transport and metabolism 5 2 4 0.529
Coenzyme transport and metabolism 3 4 2 0.717
Lipid transport and metabolism 3 0 0 0.05
Inorganic ion transport and metabolism 1 1 5 0.102
Secondary metabolites biosynthesis; transport and catabolism 0 0 1 0.368
FUNCTION UNKNOWN 23 13 10 0.049