Bi23: Random Processes in Biology


Instructor: Dr. Joshua Milstein
Office: 200T BBB
Email: milstein@caltech.edu

Summary: This class will focus on selected topics throughout biology where probability and randomness play a significant role.  We'll see that determinism is not the norm in most biological systems, that significant levels of noise are often present, and that sometimes this noise may be put to good use to help an organism adapt and survive.

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Readings


Single-Photon Detection of Cells

J.L. Schnapf and D.A. Baylor, How photoreceptor cells respond to light. Sci. Am., 256(4), 40 (1987).
F. Rieke and D.A. Baylore,  Single-photon detection by rod cells of the retina. Rev. of Mod. Phys., 70, 1027 (1998).

Bacterial Motion

E. M. Purcell, Life at low Reynolds number. Am. J. Phys., 45, 3 (1977).

H.C. Berg, Bacterial Motility and Behavior. Phys. Tod., 53, 24 (2000).
H.C. Berg, Marvels of Bacterial Behavior. Proc. Am. Phil. Soc., 150, 428 (2006).

Molecular Motors

R. D. Astumian and P. Hanggi, Brownian motors. Phys. Tod., 55, 33 (2002).

Noise Enhancement and Perception


P. Hanggi, Stochastic Resonances in Biology, Chemphyschem., 3, 285 (2002).

Neurons and the Brain

A. A. Faisal, J.A. White and S. B. Laughlin, Ion-Channel Noise Places Limits on the Miniaturization of the Brain's Wiring, Curr. Bio., 15, 1143 (2005).

J.A. White, J.T. Rubinstein and A. R. Kay, Channel noise in neurons, TINS, 23, 131 (2000).

Genetic Regulation

B.B. Kaufman and A. van Oudenaarden, Stochastic Gene Expression: From Single Molecules to the Proteome. Curr. Opin. Genet. Dev., 17, 107 (2007).

N. Fedoroff and W. Fontana, et al., Small Numbers of Big Molecules. Science, 297, 1129 (2004).
M. Elowitz, et al., Stochastic Gene Expression in a Single Cell. Science, 297, 1183 (2002).