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Unformatted text preview: Ions (e.g., Na+, K+, Cl-) Yes No Yes No No No Yes Yes Yes Yes No No No Yes Yes Thermodynamic properties Direction relative to electrochemical gradient Effect on entropy Metabolic energy required Intrinsic directionality Down Increased No No Down Increased No No Up Decreased Yes Yes Kinetic properties Membrane protein mediated Saturation kinetics Competitive inhibition No No No Yes Yes Yes Yes Yes Yes B. Transport Kinetics 1. Uncharged solutes--G depends on concentration gradient a. S outside S inside b. G = G o + RT ln [S inside ]/[S outside ] c. K eq = [S inside ]/[S outside ] = 1 d. G o = 0 e. G inward = + RT ln [S inside ]/[S outside ] 2. Charged solutesG depends on electrical potential a. Need to take into account concentration gradient and membrane potential...
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This note was uploaded on 11/25/2011 for the course BIO 3 taught by Professor Dylan during the Spring '11 term at Evergreen Valley.
- Spring '11
- cell biology