lecture 4 - Information Entropy Thermodynamics Diffusion...

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1 www.angelfire.com/mb/rweirdlife/wallpaper/neurons.jpg 2 • Organisms are open systems that: • use high quality energy & release low quality energy • maintain ordered structures at the cost of increased universal disorder • use transport along gradients Alberts et al. Fig 2.38 3 Information Theory Processor Receiver Input Archives Transmitter Output Operator Process Acquisition Transduction Retrieval Storage Command Transmission Command Operation Simple linear communication system 4 Information Theory Stability – constancy of information content Fidelity – accuracy of information readout Entropy – degradation of information content Redundancy – number of information copies www.breeke.com/gossips.htm
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5 Information Flow in Organisms “Central dogma” (Fig. 15.4) DNA RNA Protein DNA protein RNA Adapted from Freeman Fig. 15.4 6 Information Flow in Organisms stability vs. mutations fidelity vs. reading errors ± Assumption – mutation is the equivalent of entropy ± Deeper question – what is the nature of
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This note was uploaded on 04/22/2008 for the course BSCI 207 taught by Professor Higgins during the Spring '08 term at Maryland.

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lecture 4 - Information Entropy Thermodynamics Diffusion...

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