BIOL 1090 Study Guide - Final Guide: Integral Membrane Protein, Lipid Bilayer, Peripheral Membrane Protein
26 Aug 2017
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Cell theory: the cell is the structural unit of life: all organisms are composed of 1 or more cell types, cells can arise only from pre-existing cells. Integral membrane proteins span the lipid bilayer: lipid-anchored proteins attach to a lipid in the bilayer associated with lipids, but not penetrating the bilayer, peripheral membrane proteins associate with the surfaces of the lipid bilayer. Biological membranes are asymmetrical two leaflets have distinct lipid composition diffe(cid:396)e(cid:374)t i(cid:374) te(cid:396)(cid:373)s of (cid:449)hat(cid:859)s a(cid:374)(cid:272)ho(cid:396)ed to it: outer leaflet often contains glycolipids and glycoproteins (glycol = carbohydrate attached) All membranes share common properties: ~ 6 nm thick, stable, flexible, self-assembly: small lipid blobs come together to form one big blob; end liposome has the characteristics of both original liposomes. Influx: materials being brought into the cell: efflux: materials being brought out of the cell, net flux: net movement of material.
