Figure 5. Intermediate metabolites in pyrimidine metabolism influence the lifespan of C. elegans through regulating reproductive signals. (A–D) Lifespan analysis of glp-1 (e2144) animals treated with 0.5 mM (A) β-aminoisobutyrate (red), (B) cytidine (red), (C) orotate (red), (D) uridine (red), and water (black) on heat-inactivated E. coli OP50 (P value by log-rank test). The replicated data are summarized in