Fig. 2From: Aging progression of human gut microbiotaSPD recovered aging progression with taxonomical composition of human gut microbiota. a Progression similarity matrix for all genera, with each element counting the number of progression orderings the two corresponding genera shared. b We manually picked the highlighted area from (a). These selected genera were consistent with a common set of putative progression orderings. c An overall minimal spanning tree of the 14 age groups based on the selected genera. Each node represents one age groupBack to article page