Spatiotemporal expression pattern of KIF21A during normal embryonic development and in congenital fibrosis of the extraocular muscles type 1 (CFEOM1)

► KIF21A is widely expressed in embryonic and adult human and mouse neurons and muscles. ► KIF21A co-localizes with triadin in skeletal and extraocular muscles. ► KIF21A spatial expression pattern in CFEOM1 does not vary from control tissues. ► KIF21A expression pattern does not account for the restricted CFEOM1 phenotype.