DNAH5 and retinal degeneration: In particular, DNAH5 and DNAH11appear to be of interest because mutations of the genes encoding thesetwo proteins are the most common genetic causes of some ciliopathies,such as the primary ciliary dyskinesia (PCD), a collection of disordersrelated to cilia dysfunction that may result in retention of mucusand bacteria in the respiratory tract, and retinal degeneration.35,36