Candidate gene expression versus mean lifespan II. The expression level of six candidate genes was examined among 21 BxD mouse strains (see Fig. 6 caption). The dashed horizontal line indicates the average gene expression level for each gene, while the solid line indicates the estimates least-squares regression estimate. Individual plots are shown for (A) Fmo3, (B) Ero11b, (C) Serpina12, (D) Hes6, (E) Cyp2f2 and (F) Cyp4a14. The spearman rank correlation between expression and mean lifespan is shown in the upper right corner of each plot.