Table 2.

Summary of the analyzed metagenomes and predicted B1BL genes

Data set	Size (nt)	Reads	Predicted B1BL genes	Familiesa		Description
				Known	New
Isakavagu river	3.89 × 1010	3.85 × 108	0	0	0	Polluted river sediment [15]
Kazipally lake	6.75 × 109	6.68 × 107	0	0	0	Polluted lake [13]
Patancheru soil	4.73 × 1010	4.68 × 108	0	0	0	Soil [62]
Patancheru well	7.32 × 1010	7.25 × 108	3	0	3	Well water [62]
WWTP	4.82 × 1011	5.18 × 109	8	2	6	Sewage treatment plants [14]
Oil spill	2.75 × 1011	2.72 × 109	1	0	1	Oil spill [61]
Pune river	3.91 × 1011	3.11 × 109	4	1	3	River water [63]
Human gut 1	3.71 × 1011	5.22 × 109	0	0	0	Human gut [59]
Human gut 2	2.74 × 1011	3.41 × 109	0	0	0	Human gut [60]
HMP	4.69 × 1012	4.41 × 1010	0	0	0	Human microbiome [53]
Total	5.65 × 1012	6.54 × 1010	16	3	13

^aBased on a sequence similarity cut-off of  70%