C7 and systemic lupus erythematosus: The DEGs were significantly enriched (Q ≤ 0.05) in the pathway of systemic lupus erythematosus (ID: 05322), which involved 7 DEGs including HIST1H2AL, HIST1H2BJ, HIST4H4, C1 R, C4B_2, C7, and LOC110384692.