Fig. 1From: Identification of 76 novel B1 metallo-β-lactamases through large-scale screening of genomic and metagenomic dataThe relative abundance of B1BL gene fragments in the analyzed metagenomic data. The relative abundance of B1BL gene fragments varied between 13.8 and 79.0 per million metagenomic fragments. There was a significant difference in abundance between the environmental metagenomes (left) and the human microbiome (right) (p = 0.0167, Wilcoxon rank sum test). The highest levels were observed in the river sediments sampled close to the effluent of a hospital in Pune, India (“Pune river”)Back to article page