BIO 3124 Lecture Notes - Integral Membrane Protein, Pep Group Translocation, Type Three Secretion System
6 Jan 2013
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Document Summary
Size range for prokaryotes: 0. 2 m to >700 m in diameter: most rod-shaped bacteria are between 0. 5 & 4. 0 m wide and <15 m long. Examples of very large prokaryotes: epulopiscium fishelsoni (figure 3. 2a) Multiple offspring are formed and are then released from the. Epulopiscium mother cell. a mother cell of epulopiscium contains several thousand genome copies (p 80: thiomargarita namibiensis (figure 3. 2b) can be 750 m in diameter chemolithotroph. Size range for eukaryotic cells: 10 to >200 m in diameter. Lower limits of cell size: cellular organisms <0. 15 m in diameter are unlikely, open oceans tend to contain small cells (0. 2 0. 4 m in diameter, mycoplasma pneumoniae. 0. 2 m relies on host factors to acquire nutrients. Vital barrier that separates cytoplasm from environment (prevents osmotic lysis) Highly selective permeable barrier; enables concentration of specific metabolites and excretion of waste products: proteins allow substances to cross membrane.
