MIC 201 Lecture Notes - Lecture 6: Tetrapeptide, Hopanoids, Sterol
10 Apr 2019
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Plasma membrane (bac and euk are similar in pm ) Have ester linkage (arch have ether linkage) Straight fatty acid chains (arc have isoprenoid chains) They use sterols: membrane permeability (bac and arc dont) Have a low abundance of proteins (bac and erc have high abund of proteins) Cell wall of fungi is made of chitin. Cell wall of algae is made of cellulose (bac cell wall is made of pg) Versus: gram + cell wall is made of thick peptidoglycan and gram - cell wall is made on thin peptidoglycan. Eukaryotes cell wall have a b-1,4 linkage - glycosidic bonds ( bac have b,14 linkage and tetrapeptide chain/ transpeptidase bond) A chitin cell wall (fungi) has nag present, a cellulose cell wall (algae) only has glucose. (bac has nag and nam, arc has nag and nat) 2 common monomers : tubulin and actin. Tubulin function: cell movement cilia, flagella. Cilia and flagella made up of microtubules.
