Fig. 2From: Proteotyping of biogas plant microbiomes separates biogas plants according to process temperature and reactor typePrincipal component analyses of all BGPs based on taxonomic order (a), biological processes (b) and metaproteins(c). Colored groups are explained in the legend of Fig. 1. Also the clusters of De Vrieze et al. [1] are marked by blue, green or red dots Back to article page