BIOL 1090 Lecture Notes - Lecture 32: Glycocalyx, Cell Membrane, Laminin
18 Jan 2017
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Document Summary
Extends outwards form surface of plasma membrane and contains variety of secreted material that influence cellular behavior. Mediates cell to cell and cell to extracellular matrix (ecm) interactions. Organized network of material produced and secreted by cells. Components of ecm are produced by cells and assemble into a network: proteins and glycoproteins (eg. collagen, fibronectin, laminin, proteoglycans = proteins with chains of polysaccharides. Cells of bacteria, plants and fungi have walls (ecm) Composed of cellulose, hemicellulose, pectin and assorted proteins. Provide structural support to cell and to organism as a whole. Protect cell form mechanical damage and pathogen attack. Uses actin assembly-inducting protein (acta) that allows bacterium to use the actin polymerization machinery. Non-cellular macromolecule packages that can function and reproduce only within living cells. Outside of cells, a virus exists as an inanimate particle (virion) Virion comprises of a small amount of dna or rna (encoing a few to hundreds of genes: protein capsule (capsid)
