Distribution and quantity of the detected proteins. (A) The distribution of the theoretical proteome and identified proteins based on their respective size and charge. (B) The number of relatively quantified proteins in cell-type specific (Heterocysts/N2-fixing filaments) quantitative proteomic analyses of N. punctiforme. Only proteins detected in all biological replicates in the present study (Sandh et al.) and from Ow et al. are included. (C) The distribution of proteins with different abundance of cysteines in the theoretical and the identified Cys-proteome of N. punctiforme. The number of cysteines per protein in the theoretical proteome are indicated by black squares. The percentage of identified proteins within each group of proteins (containing a defined number of cysteines) are indicated by open circles. Note that the sporadic higher coverage of protein groups consisting of proteins with over 25 cysteines per protein is due to very few proteins per group.