Article 5 DNA purification controlled study 5 nonhuman 4 polymerase chain reaction 4 DNA extraction 3 Humans 3 adult 3 genetics 3 human 3 DNA isolation 2 Lactococcus lactis 2 RNA 16S 2 female 2 gene amplification 2 genomic DNA 2 isolation and purification 2 real time polymerase chain reaction 2 16S rDNA gene 1 16S rRNA sequencing 1 3' flanking region 1 5' flanking region 1 Adhesins 1 Adolescent 1 Adolescents and young adults 1 Alleles 1 Bacterial Proteins 1 Bacteriocins 1 Base Composition 1 Biofilms 1