The samples were analysed by MALDI-TOF MS. For peak list extraction we used Flex
Analysis software. Proteins were identified through Peptide Mass Fingerprinting (PMF)
using Mascot (Matrix Science). One missed cleavage per peptide was allowed and a
mass tolerance between 0.3 and 0.1Da was used in all searches. Carbamidomethylation
was set as fixed modification, oxidation (M) as variable. We searched the general
NCBI database with either all entries or specifically Caenorhabditis elegans.