Predominantly expressed in tissues containing motile cilia (PubMed:28666954, PubMed:27914912). Also expressed in non-motile ciliated adult olfactory bulbs (PubMed:28666954). Expressed in the developing fetal lung epithelium, embryonic ventral node and developing brain (at protein level) (PubMed:28666954, PubMed:27914912). Expression is activated by FOXJ1 and NOTO. Mice exhibited no impaired function of motile cilia or non-motile cilia.