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  2. Hydroxyproline - Wikipedia

    en.wikipedia.org/wiki/Hydroxyproline

    Hydroxyproline is found in few proteins other than collagen. For this reason, hydroxyproline content has been used as an indicator to determine collagen and/or gelatin amount. However, the mammalian proteins elastin and argonaute 2 have collagen-like domains in which hydroxyproline is formed.

  3. Evolution of bacteria - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_bacteria

    Bacteria are prokaryotic microorganisms that can either have a bacilli, spirilli, or cocci shape and measure between 0.5-20 micrometers. They were one of the first living cells to evolve [9] and have spread to inhabit a variety of different habitats including hydrothermal vents, glacial rocks, and other organisms.

  4. Streamlining theory - Wikipedia

    en.wikipedia.org/wiki/Streamlining_Theory

    Two of the free-living bacterial taxa with the smallest genomes are Prochlorococcus and Pelagibacter ubique, [4] [5] both highly abundant marine bacteria commonly found in oligotrophic regions. Similar reduced genomes have been found in uncultured marine bacteria, suggesting that genomic streamlining is a common feature of bacterioplankton. [6]

  5. Eukaryogenesis - Wikipedia

    en.wikipedia.org/wiki/Eukaryogenesis

    Eukaryogenesis, the process which created the eukaryotic cell and lineage, is a milestone in the evolution of life, since eukaryotes include all complex cells and almost all multicellular organisms. The process is widely agreed to have involved symbiogenesis , in which an archeon and a bacterium came together to create the first eukaryotic ...

  6. Black Queen hypothesis - Wikipedia

    en.wikipedia.org/wiki/Black_Queen_hypothesis

    The Black Queen hypothesis (BQH) is a reductive evolution theory which seeks to explain how natural selection (as opposed to genetic drift) can drive gene loss. [1] [2] In a microbial community, different members may have genes which produce certain chemicals or resources in a "leaky fashion" making them accessible to other members of that community.

  7. Evolution - Wikipedia

    en.wikipedia.org/wiki/Evolution

    Evolution is the change in the heritable characteristics of biological populations over successive generations. [1] [2] It occurs when evolutionary processes such as natural selection and genetic drift act on genetic variation, resulting in certain characteristics becoming more or less common within a population over successive generations. [3]

  8. Directed evolution - Wikipedia

    en.wikipedia.org/wiki/Directed_evolution

    The outer circle demonstrates steps in a typical experiment. The red symbols indicate functional variants, the pale symbols indicate variants with reduced function. Directed evolution (DE) is a method used in protein engineering that mimics the process of natural selection to steer proteins or nucleic acids toward a user-defined goal. [1]

  9. Last universal common ancestor - Wikipedia

    en.wikipedia.org/wiki/Last_universal_common_ancestor

    The emergence of Na + /H + antiporters likely lead to the evolution of impermeable membranes present in eukaryotes, archaea, and bacteria. It is stated that "The late and independent evolution of glycolysis but not gluconeogenesis is entirely consistent with LUCA being powered by natural proton gradients across leaky membranes.