Abstract:
:We have programmed a Monte Carlo simulation of the Q-cycle model of electron transport in cytochrome b(6)f complex, an enzyme in the photosynthetic pathway that converts sunlight into biologically useful forms of chemical energy. Results were compared with published experiments of Kramer and Crofts (Biochim. Biophys. Acta 1183:72-84, 1993). Rates for the simulation were optimized by constructing large numbers of parameter sets using Latin hypercube sampling and selecting those that gave the minimum mean square deviation from experiment. Multiple copies of the simulation program were run in parallel on a Beowulf cluster. We found that Latin hypercube sampling works well as a method for approximately optimizing very noisy objective functions of 15 or 22 variables. Further, the simplified Q-cycle model can reproduce experimental results in the presence or absence of a quinone reductase (Q(i)) site inhibitor without invoking ad hoc side-reactions.
journal_name
Bull Math Bioljournal_title
Bulletin of mathematical biologyauthors
Schumaker MF,Kramer DMdoi
10.1007/s11538-010-9616-2subject
Has Abstractpub_date
2011-09-01 00:00:00pages
2152-74issue
9eissn
0092-8240issn
1522-9602journal_volume
73pub_type
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