Approximate maximum likelihood estimation for stochastic chemical kinetics
Computer Science Department, Saarland University, 66123 Saarbrücken, Germany
EURASIP Journal on Bioinformatics and Systems Biology 2012, 2012:9 doi:10.1186/1687-4153-2012-9Published: 18 July 2012
Recent experimental imaging techniques are able to tag and count molecular populations in a living cell. From these data mathematical models are inferred and calibrated. If small populations are present, discrete-state stochastic models are widely-used to describe the discreteness and randomness of molecular interactions. Based on time-series data of the molecular populations, the corresponding stochastic reaction rate constants can be estimated. This procedure is computationally very challenging, since the underlying stochastic process has to be solved for different parameters in order to obtain optimal estimates. Here, we focus on the maximum likelihood method and estimate rate constants, initial populations and parameters representing measurement errors.