anchor.diff:  * In eukaryotic cells, molecular motors are known to cause cytoplasm "mixing"
   * This mechanism is not expected to exist in E. coli
   
  +== Biological Considerations
  +
  +* Metabolic activity does not significantly raise the temperature of the cell (right?)
  +* ATP, the main energy source of metabolism, has energy \(E_\mathrm{ATP} \sim 20 k_B T\)
  +* Metabolic activity would not have a rotational orientation
  +
   == Simulating Metabolism
   
   * Langevin thermostat
  
positive.code: ** WCA potential / repulsive Lennard-Jones for \(U\)
  ** Damping \(\gamma\) to simulate solution viscosity
  ** Random, instantaneous "kicks" to the particles
  ** \(\vec \Gamma_T\) for the thermostat; balanced by \(\gamma\)
  ** \(\vec \Gamma_k\) for metabolism
  
  == Biological Considerations
  
  * Metabolic activity does not significantly raise the temperature of the cell (right?)
  * ATP, the main energy source of metabolism, has energy \(E_\mathrm{ATP} \sim 20 k_B T\)
  * Metabolic activity would not have a rotational orientation
  
  == Random Kicks
  
  * The thermostat gives random kicks, \(\Gamma_T \sim \Delta t k_B T \sim {10}^{-5} k_B T\)
  
  * Metabolism kicks are \(0 \le E_k \le 20 k_B T\), instantaneous, and uncorrelated
  
  == Simulation
  
  
negative.code: * \(f\) is the kick _frequency_, _T_ is the measured _temperature_
  * Kicks that are too frequent raise the temperature
  
  == Acknowledgments
  
  * Corey O'Hern, Mark Shattuck, Christine Jacobs-Wagner
  * Brad Parry, Ivan Surovtsev, Eric Dufresne, and everyone I talked to
  