ABCG2 and systemic lupus erythematosus: The pathways of ABC transporters, NF-kappa B signaling pathway and Ras signaling pathway were enriched in Q1 and Q2 with down-regulated Kub sites, while proteins with up-regulated Kub sites were enriched in Hapatitis B, systemic lupus erythematosus and so on (Figure 2D).