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. 2017 Dec 18;13(12):e1005891. doi: 10.1371/journal.pcbi.1005891

Fig 2. Scheme of calculations.

Fig 2

A cell with S = 3 CRISPR spacers encounters viruses as a Poisson process with an average rate rN. During each encounter there is either a successful interference with probability I or the cell dies with probability 1 − I. We evaluate the probability E(t) of the cell to survive till time t as the measure of performance of its CRISPR-Cas system.