Fig. 6: Heat map showing the z-score for genes in the complete metagenomes that were in the KEGG category of energy metabolism.

The z-score is calculated using the proportion of KEGG pathways (A) and KEGG modules (B) identified in each metagenome to the total number of Prodigal predicted genes, darker red (3.5) there are above average reads and darker blue (−3.5) there are below average reads.