BIO130H1 Lecture 15: lecture 15

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29 Mar 2017
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BIO130H1 Full Course Notes
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The proteins that are involved in membrane transport: multipass transmembrane proteins, create a protein lined path across cell membrane, transport polar and charged molecules b. i. Ions, sugars, amino acids, nucleotides, and cell metabolites. Charged molecules don"t pass well because they don"t interact with the hydrophilic tails well. The transport proteins are selective they transport specific classes. The different cell membranes (plasma membrane vs cell membrane) have different compliments = gives organelles different functions a glucose taken upstream, broken down in cytosol, the transporters are the cell surface of the plasma membrane, not in the organelles. Passive: diffusion = diffusing from high concentration to low concentration this is used when a molecule is able to pass through the hydrophobic component of the membrane. Specialized proteins: channel proteins: create a channel and only move molecules by passive transport, transporter mediated: move molecules by passive or active transport.

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