Figure 1: GO analysis of differentially enriched proteins in the fluids of mouse caput and cauda. A total of 128 differentially enriched proteins were identified by iTRAQ, 46 caput-enriched and 82 cauda-enriched proteins are annotated. The caput (a) and cauda (b) enriched luminal proteins are classified in different categories based on the biological processes, the caput (c) and cauda (d) enriched luminal proteins are also classified based on the molecular functions. The top ten terms of GO enrichment with P < 0.05 were listed. iTRAQ: isobaric tag for relative and absolute quantitation; GO: gene ontology.