Figure 7. Relative abundance of COG functional categories for ZC1 and ZC2 and seven public metagenomes.

Assembled sequence reads were classified into the 25 COG categories designated in Figure 5 and their relative abundances for each metagenome were estimated considering the respective total number of protein coding sequences with function prediction. The public metagenomes included in the comparison are benzene-degrading bioreactor, biofuel reactor, compost minireactor, termite hindgut, poplar biomass bioreactor, lake sediment and soil rain forest, whose features are listed in Table S5. Asterisks indicate statistically significant values.