Table 3. Functional enrichment analysis of A7 group genes by GO-terms and KEGG pathway (P<0.05).

Term	Category #	Number of genes observed	%	P value
enzyme inhibitor activity	M.F.	4	10.8	1.9×10−2
small GTPase mediated signal transduction	B.P.	4	10.8	2.0×10−2
cell surface	C.C.	4	10.8	4.3×10−2
oxidative phosphorylation	B.P.	3	8.1	1.4×10−2
hydrogen ion transmembrane transporter activity	M.F.	3	8.1	1.6×10−2
SH3 domain binding	M.F.	3	8.1	1.7×10−2
aging	B.P.	3	8.1	1.8×10−2
antigen processing and presentation of peptide antigen via MHC class I	B.P.	2	5.4	4.0×10−2
oxidative phosphorylation	KEGG Pathway	3	8.1	3.7×10−2

^#Category: B.P. (biological process); C.C. (cellular component); M.F. (molecular function).