Fig. 5

Transmission electron micrographs and magnetosome particle sizes at process end among seed-train (n = 2925), microoxic (1% dO₂) (n = 3180) and anoxic (0% dO₂) conditions (n = 3025) with representative TEM micrographs of cells under the respective conditions (scale bar 200 nm). In box plots, the box indicates the interquartile range, the bar indicates the median, and the red dot represents the mean. Grey dots represent data points above or below the 95th and 5th percentile. The violin plots show the magnetosome particle size distribution of measured particle sizes. For statistical comparison of particle sizes, Wilcoxon rank sum test was performed (****, p < 0.0001)