Biological Physics: Energy, Information, Life

Problems[[Student version, January 17, 2003]] 405 Problems 10.1Complex processes Figure 10.29 shows the rate of firefly flashi ...

406 Chapter 10. Enzymes and molecular machines[[Student version, January 17, 2003]] ratchet mechanism. a. Suppose the external f ...

Problems[[Student version, January 17, 2003]] 407 byadding a second reaction (compare Figure 10.13), ES+I cIk 3
k- 3 ESI. He ...

408 Chapter 10. Enzymes and molecular machines[[Student version, January 17, 2003]] reversibly inhibited by the addition of urea ...

Chapter 11 Machines in membranes In going on with these Experiments how many pretty Systems do we build which we soon find ourse ...

410 Chapter 11. Machines in membranes[[Student version, January 17, 2003]] physically what electricity really was. For example B ...

11.1. Electro-osmotic effects[[Student version, January 17, 2003]] 411 ∆V=V 2 −V 1 c 2 c 1 Figure 11.1: (Schematic.) Measurement ...

412 Chapter 11. Machines in membranes[[Student version, January 17, 2003]] a in membrane out concentration electrostatic potenti ...

11.1. Electro-osmotic effects[[Student version, January 17, 2003]] 413 outside (from the right of the figure). At first, everyth ...

414 Chapter 11. Machines in membranes[[Student version, January 17, 2003]] 11.1.3 Donnan equilibrium can create a resting membra ...

11.2. Ion pumping[[Student version, January 17, 2003]] 415 Solution: a. The charge on a chloride ion is opposite to that on pota ...

416 Chapter 11. Machines in membranes[[Student version, January 17, 2003]] Table 11.1:Approximate ion concentrations inside and ...

11.2. Ion pumping[[Student version, January 17, 2003]] 417 Figure 11.3: (Metaphor.) If water is continuously pumped to the upper ...

418 Chapter 11. Machines in membranes[[Student version, January 17, 2003]] hours and it never stops, you may begin to suspect th ...

11.2. Ion pumping[[Student version, January 17, 2003]] 419 R=1/(gA) VNernst I=jqA ∆V=V 2 −V 1 (in) 1 2 (out) 2 Figure 11.4:(Circ ...

420 Chapter 11. Machines in membranes[[Student version, January 17, 2003]] to water but not to ions, so the conductances to diff ...

11.2. Ion pumping[[Student version, January 17, 2003]] 421 1 10 100 50 100 150 200 250 300 outward sodium flux, arbitrary units ...

422 Chapter 11. Machines in membranes[[Student version, January 17, 2003]] 10 20 30 40 04080120 phosphate created 0 mM NaCl 10 m ...

11.2. Ion pumping[[Student version, January 17, 2003]] 423 the total free-energy cost to pump one sodium ion out is thus −e(∆V−V ...

424 Chapter 11. Machines in membranes[[Student version, January 17, 2003]] wehavequalitatively answered our paradox: The membran ...