Fig. 4.

Three functional classifications of the proteins in the hippocampus of mice re-exposed to conditioned chambers. a The schematic diagram of trace fear conditioning and protein collection (n = 3/group). b Venn diagram defining the difference in protein expressions between Prdx6^−/− and Prdx6^+/+ mice. The 125 upregulated proteins and 130 down-regulated proteins affected by the contextual test were classified into three functional classifications: c molecular function, d biological process, and e cellular component