KIF4B is a kinesin family motor protein belonging to the KIF27 subfamily 1, with established roles in mitotic cell division. During mitosis and cytokinesis, KIF4B functions in anaphase spindle dynamics and is essential for cytokinesis, likely through its involvement in central spindle organization 2. The protein operates as a microtubule-based motor involved in chromosome 5 and mitotic spindle organization, consistent with other KIF4 family members that localize to chr5 during mitosis and the mitotic spindle during cytokinesis 3. KIF4B expression has clinical significance in hepatocellular carcinoma (HCC), where elevated levels correlate with worse prognosis; multivariate analysis identified KIF4B as an independent prognostic factor for HCC, with overexpression associated with shorter overall survival times 4. Additionally, a genetic variant near KIF4B (rs79666294) was identified in genome-wide association studies of vitamin D metabolism in African American populations, suggesting potential metabolic functions requiring further investigation 5. While KIF4B's primary mitotic functions are well-characterized, its broader biological roles and mechanisms in vitamin D metabolism remain to be elucidated.