Daf-2 mutation suppresses the clk-1 mitochondrion-dependent intestinal bacterial proliferation phenotype. Survival of N2 C. elegans and clk-1 mutants when grown on lawns of E. coli OP50 (Panel A). Panel B: Intestinal load of E. coli OP50 within N2 C. elegans and clk-1 mutants on day 2 (L4 stage + 2 days) of their lifespan. Data represent Mean ± SD from experiments involving 30 worms/group. Panel C: Survival of daf-2 and clk-1 single mutants and the daf-2;clk-1 double mutant when grown on lawns of E. coli OP50. Panel D: Intestinal density of viable E. coli OP50 in the intestine of the daf-2 and clk-1 single mutants and the daf-2;clk-1 double mutants.