CHEK1 and acute lymphoblastic leukemia: The DEGs used for network construction were cyclin-dependent kinase 1 (CDK1), cyclin A2 (CCNA2), marker of proliferation Ki-67 (MKI67), topoisomerase II alpha (TOP2A), forkhead box protein M1 (FOXM1), exonuclease 1 (EXO1), kinesin family member 11 (KIF11), checkpoint kinase 1 (CHEK1), budding uninhibited by benzimidazoles 1 (BUB1), and BUB1B, all of which were overexpressed in T-ALL.