Spaceflight effect on immune-related liver gene expression based on functional analysis.

Functional analysis was performed with IPA software. Activation z score = statistical value representing the activation state. Z > 2.0 or <-2.0 is generally considered significant. P value = P-value of overlap, a statistical representation describing the level of overlap of genes in our data set compared to the total number of genes known to be directly involved in a particular function based on the literature. # molecules = Number of genes in our data set known to be directly involved in a particular function based on the literature. A complete description of the analysis can be found on the IPA website (http://www.ingenuity.com/).