Flagellar protein involved in sperm flagellum axoneme organization and function (By similarity). Involved in the regulation of the beating frequency of motile cilia on the epithelial cells of the respiratory tract (By similarity). Testis-specific. The disease is caused by variants affecting the gene represented in this entry. The disease may be caused by variants affecting the gene represented in this entry. Belongs to the CFAP43 family. Truncated N-terminus.