Figure 9. Investigate the differences in immune characteristics between the high- and low-POP1 groups. (A–C) Discrepancies in three scores between the high- and low-POP1 groups. (D) Expression differences of 53 immune characteristics between the high- and low-POP1 groups of BC patients. (E) Correlation analysis of four immune checkpoints in high- and low-POP1 population of BC patients. *P < 0.05; **P < 0.01; ***P < 0.001.