Fig. 2

Effects of sample storage methods on community structure inferred for oral swabs. Oral swab samples were acquired from three human individuals and DNA extracted. DNAs were amplified using 16S rRNA gene primers binding to the V1-V2 region then sequenced using the Illumina platform using our standard procedures [88]. Unweighted Unifrac (C [129].) was used to generate distances between all pairs of samples then results were displayed using Principal Coordinate Analysis (PCoA). a Samples from each of the three subjects are color coded (red, blue, and green). b Nine storage conditions were compared, indicated by the different colors. The key to storage conditions is at the right