## Figure 2.
Effect of diet on infant microbiota. BF (breast-fed) infants (green) exhibited more heterogeneity than FF (formula-fed)
infants (blue) with respect to phylogenetic composition. (a) Taxon assignment (phylum level) variability for BF and FF samples using 16S rRNA alignments
to GreenGenes (see Materials and methods). A diet label permutation test using the
statistic ∑_{s }|∑_{iεBF }p_{is}/6 - ∑_{iεFF }p_{is}/6|, where s indexes phylum and iεBF and iεFF denote that sample i is BF or FF infant,
respectively, and p denotes the associated taxon proportion, rejected the null hypothesis
that variability in phylogenetic composition was unrelated to BF/FF status with a
P-value of 0.011. (b) Taxon assignments for all the shotgun reads (not just 16S rRNA homologs) using PhymmBL
[17]. (c) Shannon-Weiner index for BF and FF infants, indicating alpha-diversity for each sample.
Schwartz |