Fig. 5: Comparing dynamics of cyanobacterial carbon and sulfur uptake relative to nitrogen fixation.

Mean APE of Nostoc M2 for each of the stable isotopes. Each point represents the mean APE of 20–27 single cell analyses from the three time points for either 33S and 15N (top) or 13C and 15N (bottom). Error bars represent one standard error of the mean. Pearson correlation for 13C APE was significant (r = 0.998, p = 0.042), and not for 33S APE (r = 0.798, p = 0.41).