Table 2.

The sizes of fragments from each region of the 16 S rRNA gene, recovered from the bacterial sequences recorded in the Silva 123 database. The number of fragments within the 99% confidence range is indicated, as is the size range.

Region	Number of fragments	Fragments into the confidence range 99%	Mean	Standard Deviation	Size (range)
V1	161,482	159,808	96.08	8.62	78.84 – 113.32
V2	397,049	395,814	258.90	7.11	244.67 – 273.12
V3	486,589	485,252	175.08	11.38	152.33 – 197.84
V4	478,491	476,047	283.04	0.78	281.48 – 284.61
V5	483,462	481,755	140.90	1.73	137.44 – 144.37
V6	489,859	488,026	154.53	2.26	150.00 – 159.06
V7	444,220	443,501	132.50	3.11	126.27 – 138.72
V8	343,456	342,108	226.98	2.17	222.63 – 231.33
V9	166,692	166,390	113.56	4.64	104.29 – 122.84