BCKDK and breast carcinoma: Notably, since the importance of BCKDK translocation to the nucleus was proven (Figure 1), we closely examined nuclear‐localized BCKDK in these clinical patient samples and found a large proportion of tumor samples exhibited strong nuclear BCKDK staining in contrast to adjacent normal tissues (Figure 5e), further demonstrating that nuclear‐localized BCKDK is associated with breast cancer progression.