A DNA stack nano-device is a bio-computing system that can read and write molecular signals based on DNA-DNA hybridisation and strand displacement. In vitro implementation of the DNA stack faces a number of challenges affecting the performance of the system. In this work, we apply probabilistic model checking to analyse and optimise the DNA stack system. We develop a model framework based on continuous-time Markov chains to quantitatively describe the system behaviour. We use the PRISM probabilistic model checker to answer two important questions: 1) What is the minimum required incubation time to store a signal? And 2) How can we maximise the yield of the system? The results suggest that the incubation time can be reduced from 30 minutes to 5-15 minutes depending on the stack operation stage. In addition, the optimised model shows a 40% increase in the target stack yield.
@InProceedings{li_et_al:LIPIcs.DNA.28.5, author = {Li, Bowen and Mackenzie, Neil and Shirt-Ediss, Ben and Krasnogor, Natalio and Zuliani, Paolo}, title = {{Modelling and Optimisation of a DNA Stack Nano-Device Using Probabilistic Model Checking}}, booktitle = {28th International Conference on DNA Computing and Molecular Programming (DNA 28)}, pages = {5:1--5:22}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-253-2}, ISSN = {1868-8969}, year = {2022}, volume = {238}, editor = {Ouldridge, Thomas E. and Wickham, Shelley F. J.}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.DNA.28.5}, URN = {urn:nbn:de:0030-drops-167904}, doi = {10.4230/LIPIcs.DNA.28.5}, annote = {Keywords: probabilistic model checking, CTMC, DNA computing, DNA stack} }
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