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. 2015 Aug 7;81(17):5976–5986. doi: 10.1128/AEM.00807-15

FIG 9.

FIG 9

Proposed model of constrained plasmid distribution that explains the population heterogeneity during recombinant protein production. Polar fixation of plasmids (red circles) after cell division led to cell lines with high and low production performances. In this schema, plasmids were fixed to the old cell pole. However, polar fixation can affect either the old or the new cell pole.