BIOL-M 250 Lecture Notes - Lecture 4: Teichoic Acid, Sulfur, Gram-Positive Bacteria
Document Summary
Consume: sugar, light, toxins(h2s), make alcohol, breath uranium, etc * diverse metabolism. Numerical taxonomy//traits, dna dna hybridization//gene comparison, phylogenetics//molecular chronometer, polyphasic approaches//combo, naming by disease. The only formal definition of bacterial species today, is >70% dna-dna hybridization: con: the two organisms being compared must be very genetically similar for the technique to be meaningful. Cytochrome c: protein involved in aerobe respiration. Atpase: protein in atp synthesis in animals/plants/microbes. Reca: protein for homologous recombination in almost all organisms. 16s rrna: nucleic acid involved in ribosome structure in all cellular life: choose sequence of protein or gene, as time passes& bacteria evolve: sequence of chronometer slowly changes . Fewer changes in sequence are closer related: polyphasic approach: naming by a combination of approaches . Disease bacterium: tuberculosis mycobacterium tuberculosis, anthrax, leprosy, typhus. Nucleic acid sequence in all living things, part of ribosome, relatively constant regions to compare to ancient relatives, highly variable regions to compare to recent relatives( bacteria, archea, & eukarya)
