Fig. 3

Functional annotation of the integron-associated genes (solid bars) and other genes found in metagenomes using COG functional categories (striped bars). Of the 13,397 integron-associated genes in our catalog, 2,277 genes matched a COG with a known function. 116,259,264 ORFs were not associated with integrons in metagenomes, out of which 50,201,496 matched a COG with a known function. Percentages on the plot are given in relation to those numbers