Extracellular DNA may be a component of the biofilm formed by SCVs.

<p>(A) Autolysis of the CF07-L, CF07-S and CF07-SΔ<i>sigB</i> strains as a function of time. Results are expressed as percentages of the initial turbidity for each condition. (B) Susceptibility of SCVs' biofilms to treatment with DNase I. Statistically significant differences between control and treated conditions are indicated (*, <i>P</i><0.05; **, <i>P</i><0.01; unpaired <i>t</i> test, <i>n</i> = 3–4). Results are normalized according to control condition for each strain. Results are expressed as means with standard deviations.