Our proteomic data reached beyond the wild type C. elegans strain to
examine the long-lived, high-fat daf-2(e1370) mutants. This strain
carries a mutation in the sole insulin-like growth factor receptor in
C. elegans. Strains carrying this mutation show increased stress resistance
and extreme longevity [34,57]. Because the daf-2 strain contains
large lipid droplets and excess fat accumulation, we predicted that different
proteins might be associated with lipid droplets in this strain
[16]. Therefore, we were surprised to identify very similar proteomes
in wild type and daf-2 mutants, indicating that the lipid droplet proteins
are not a major driver of the striking longevity and metabolic differences
in daf-2 mutants.