Ouzounis, C. A., V. Kunin, N. Darzentas, and L. Goldovsky. (2006) A Minimal Estimate for the Gene Content of the Last Universal Common Ancestor – Exobiology from a Terrestrial Perspective. Res Microbiol 157: 57–68.

Pace, N. R. (1997) A Molecular View of Microbial Diversity and the Biosphere. Science 276: 734–740.

Pace, N. R. (2006) Time for a Change. Nature 441: 289.

Pace, N. R. (2009a) Mapping the Tree of Life: Progress and Prospects. Microbiol Mol Biol Rev 73: 565–576.

Pace, N. R. (2009b) Problems with «Procaryote». J Bacteriol 191: 2,008—2,010; discussion 2,011.

Pais, A. (1994) Niels Bohr’s Times: In Physics, Philosophy and Polity. Oxford: Oxford University Press.

Pal, C., B. Papp, and L. D. Hurst. (2001) Highly Expressed Genes in Yeast Evolve Slowly. Genetics 158: 927–931.

Pal, C., B. Papp, and M. J. Lercher. (2005) Adaptive Evolution of Bacterial Metabolic Networks by Horizontal Gene Transfer. Nat Genet 37: 1,372—1,375.

Pande, V. S., A. Grosberg, T. Tanaka, and D. S. Rokhsar. (1998) Pathways for Protein Folding: Is a New View Needed? Curr Opin Struct Biol 8: 68–79.

Patterson, D. J. (1999) The Diversity of Eukaryotes. Am Nat 154: S96—124.

Paul, J. H. (2008) Prophages in Marine Bacteria: Dangerous Molecular Time Bombs or the Key to Survival in the Seas? ISME J 2: 579–589.

Pennisi, E. (1999) Is It Time to Uproot the Tree of Life? Science 284: 1,305—1,307.

Pennisi, E. (2009) History of Science. The Case of the Midwife Toad: Fraud or Epigenetics? Science 325: 1,194—1,195.

Penny, D. (2005) An Interpretative Review of the Origin of Life Research. Biol Philos, in press.

Pereto, J., P. Lopez-Garcia, and D. Moreira. (2004) Ancestral Lipid Biosynthesis and Early Membrane Evolution. Trends Biochem Sci 29: 469–477.

Perna, N. T., G. Plunkett III, V. Burland, B. Mau, J. D. Glasner, D. J. Rose, G. F. Mayhew, P. S. Evans, J. Gregor, H. A. Kirkpatrick, G. Posfai, J. Hackett, S. Klink, A. Boutin, Y. Shao, L. Miller, E. J. Grotbeck, N. W. Davis, A. Lim, E. T. Dimalanta, K. D. Potamousis, J. Apodaca, T. S. Anantharaman, J. Lin, G. Yen, D. C. Schwartz, R. A. Welch, and F. R. Blattner. (2001) Genome Sequence of Enterohaemorrhagic Escherichia Coli O157:H7. Nature 409: 529–533.

Pisani, D., J. A. Cotton, and J. O. McInerney. (2007) Supertrees Disentangle the Chimerical Origin of Eukaryotic Genomes. Mol Biol Evol 24: 1,752—1,760.

Poole, A. M. (2009) Horizontal Gene Transfer and the Earliest Stages of the Evolution of Life. Res Microbiol 160: 473–480.

Poole, A. M., D. C. Jeffares, and D. Penny. (1998) The Path from the Rna World. J Mol Evol 46: 1—17.

Poole, A. M., and D. Penny. (2007) Evaluating Hypotheses for the Origin of Eukaryotes. Bioessays 29: 74–84.

Popper, K. R. (1982) Unended Quest: An Intellectual Autobiography. London: Open Court Publishing Company.

Prangishvili, D., P. Forterre, and R. A. Garrett. (2006a) Viruses of the Archaea: A Unifying View. Nat Rev Microbiol 4: 837–848.

Prangishvili, D., R. A. Garrett, and E. V. Koonin. (2006b) Evolutionary Genomics of Archaeal Viruses: Unique Viral Genomes in the Third Domain of Life. Virus Res 117: 52–67.

Price, M.N., P. S. Dehal, and A. P. Arkin. (2010) FastTree 2 – approximately maximum-likelihood trees for large alignments. PLoS One 5: e9490.

Prusiner, S. B. (1998) Prions. Proc Natl Acad Sci USA 95: 13,363—13,383.