Fig. 6.

A subset of individual functional groups that are metagenomically stable but differentially transcribed between individuals. (A–C) In each example, the four most DNA-abundant genes from a functional module with strong between-subject expression variation are highlighted. RNA (red) and DNA (blue) measurements from the same individual are connected by gray lines. (D) The proteasome is an example of a functional module whose variability at the RNA level can be attributed largely to variation at the DNA level, rather than differential expression.