TMPRSS11D and acute myeloid leukemia: To understand the role of HAT‐L4 expression in AML, we established THP‐1–derived shNC (transduced with scrambled shRNAs), shH (transduced with HAT‐L4‐targeting shRNAs) and shR (transduced with HAT‐L4–targeting shRNAs and HAT‐L4 cDNA with mutated targeting sites) cells.