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Experiment 1. (a) 35S-DMSP retained in cells (d.p.m.) as a function of the number of sorted cells: Prochlorococcus (Prochl), Synechococcus (Syn) and heterotrophic bacteria (HB). (b) Average 35S-DMSP retained per cell (d.p.m. per cell). (c) Same as (b) but scaled to cell volume (d.p.m. per μm3), assuming that Prochlorococcus and Synechococcus are 5 and 10 times larger, respectively, than heterotrophic bacteria. Shown are means±standard errors.
