Microbial Diversity in the Era of Omic Technologies

Table 1

Comparison of the main phylogenetic oligonucleotide and functional gene arrays.

Gene array	Probe type	No. of probes	Analysis provided
PhyloChip G2	25-mer oligos	297,851	8,935 OTUs
PhyloChip G3	25-mer oligos	1,100,000	59,959 OTUs
GeoChip 3.0	50-mer oligos	27,812	292 gene families
GeoChip 4.0	50-mer oligos	120,054	539 gene families^a

aGeoChip contains genes targeting human microbiomes in 139 functional gene families with 36,062 probes.