ZFP36L1 and T-cell acute lymphoblastic leukemia: However, mice with single KO of Zfp36l1 or Zfp36l2 individually in T cells during thymic development do not develop T cell acute lymphoblastic leukemia, suggesting that Zfp36l1 and Zfp36l2 may have redundant functions in T cells (Hodson et al, 2010).