Abstract
Two-dimensional (2D) crystals of integral membrane proteins, comprising ordered protein reconstituted into a synthetic lipid bilayer, can be induced to form from detergent solubilized and purified membrane protein sources via the addition of exogenous lipid and the subsequent removal of the solubilizing detergent. This is most commonly accomplished by dialysis of a small volume of ternary protein-detergent-lipid mixture against a large volume of buffer, and can be carried out using common, easily available materials. Following successful crystallization, electron crystallographic data obtained by electron cryo-microscopy (cryo-EM) of vitrified 2D crystals can be used to determine the structure of the lipid bilayer-embedded integral membrane protein.
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