FIGURE 5.

Diversity and taxonomic distribution of proteins involved in nutrient transport, nitrogen assimilation, light harvesting, and oxidative stress response for each methodology. Horizontal and vertical bar charts correspond to the total number of peptides detected for a given function (y-axis) or order (x-axis) in all metaproteomes. Protein isoforms and/or sub-unit were grouped under the same function. The lack of symbol in colored boxes means that the protein was observed in both gel-free and gel-based approaches.