BIOL448 Study Guide - Final Guide: Mota, Fimbria (Bacteriology), Archaea
14 Apr 2015
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1,4 linkages of alternating glcnac and murnac (n acetylglucosamine and muramic acid: glycan chains cross linked by peptides for strength and regidity, synthesis disrupted by penicillin, vancomycin and bacitracin, destroyed by lysozyme (hydrolyzes glycosidic linkages, tetrepeptide: l alanine, d glutamate, l r3, d alanine, cell wall components. Gram negative outer membrane: lipopolysaccharides (lipid a; endotoxin), core polysaccharide and o polysaccharide (o antigen, murein lipoprotein anchors om to peptidoglycan, porins form hydrophilic channels through om; allows diffusion of low mw neutral and charged molecules across om, lamb facilitates translocation of larger solutes. Bacterial phospholipids ester linked to glycerol: more than 100 different membrane proteins fluid mosaic functions: solute transport electron transport photosynthetic electron transport electrochemical gradient motility. Eukaryotic: microtubules around division site, mreb actin family forms spiral, actin encircling cell under cm (deficiency makes rods(cid:224)cocci, crescentin like intermediate filaments, forms helical filaments along concave side of vibroid cells, cell wall less bacteria have internal protein cytoskeleton unrelated to eukaryotic.
