Fig. 3

Taxonomic composition of the metatranscriptome. Dendrogram of the hierarchical clustering of relative abundance profiles for the top 25 genera as measured with mRNA transcripts for all 33 cyclists. Genera in the dataset are listed in the key on the left in descending order, with Bacteroides on top as the most abundant organism across all the samples. Included on the dendrogram branches are assigned AU p values. Clustering was performed using the BC distance metric and average-linkage method. The colors of the branches reflect the mWGS cluster that cyclist was in as shown in Fig. 1 (dark blue is cluster 1, light blue cluster 2, and black cluster 3). For cyclist sample names, ‘C’ indicates a CAT 1 (amateur) cyclist and ‘P’ depicts a professional cyclist