BCL11B and acute lymphoblastic leukemia: 5) in T cells by the juxtaposition of regulatory sequences found at the 3’ region of the Bcl11b gene in T-ALL (acute lymphoblastic leukemia) patients (Bernard et al., 2001; MacLeod et al., 2003; Nagel et al., 2003, 2007; Su et al., 2006; Van Vlierberghe et al., 2008; De Keersmaecker et al., 2010).