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Effects of iron on P. aeruginosa (a) and C. albicans (b) growth. Monocultures (Mon) and cocultures (Coc). Growth was determined after 24 h of culture. To quantify the growth of C. albicans and P. aeruginosa in cocultures, cells (including planktonic and sessile cells) were separated on a Percoll gradient (Supplementary Materials and Methods) and were suspended in 20 ml water. Optical density (OD600) for each species was determined. The panels present the means±s.e.m. (n=3).
