Microtubule inner protein (MIP) part of the dynein-decorated doublet microtubules (DMTs) in cilia and flagellar axoneme. Forms filamentous polymers in the walls of ciliary and flagellar microtubules.
Subcellular locations: Cytoplasm, Cytoskeleton, Cilium axoneme, Cytoplasm, Cytoskeleton, Flagellum axoneme
Predominantly expressed in testis. Expressed in airway epithelial cells .