Evolution
The production of PAF can be found in the fossil records of protozoan’s, yeasts, plants, bacteria, and mammals. The oldest example of PAF being used in a regulatory role was found in protozoans. The regulatory role is thought to diverge from that point and be maintained as living organisms started to evolve. During evolution, functions of PAF in the cell have been changing and enlarging.
PAF has been found in plants but its function has not yet been determined.
Read more about this topic: Platelet-activating Factor
Famous quotes containing the word evolution:
“The evolution of sense is, in a sense, the evolution of nonsense.”
—Vladimir Nabokov (1899–1977)
“Like Freud, Jung believes that the human mind contains archaic remnants, residues of the long history and evolution of mankind. In the unconscious, primordial “universally human images” lie dormant. Those primordial images are the most ancient, universal and “deep” thoughts of mankind. Since they embody feelings as much as thought, they are properly “thought feelings.” Where Freud postulates a mass psyche, Jung postulates a collective psyche.”
—Patrick Mullahy (b. 1912)
“The more specific idea of evolution now reached is—a change from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity, accompanying the dissipation of motion and integration of matter.”
—Herbert Spencer (1820–1903)