RNA gene RNA 16S 5 RNA, Ribosomal, 16S 5 genetics 5 Humans 4 human 4 nonhuman 4 Article 3 Gastrointestinal Microbiome 3 Genes, rRNA 3 intestine flora 3 16S rRNA gene 2 Algorithms 2 Bacteria 2 Computational Biology 2 Databases, Genetic 2 Host Microbial Interactions 2 Microbiota 2 algorithm 2 bacterium 2 biology 2 classification 2 controlled study 2 gene sequence 2 genetic database 2 isolation and purification 2 microbial community 2 microbiology 2 microflora 2 polymerase chain reaction 2