Centrioles play a key role in the assembly of the centrosome, the major microtubule organizing center, and are crucial for the formation of cilia and flagella. Significant progress has been made toward understanding centriole biogenesis, but the mechanisms that determine centriole length and prevent centrioles from forming cilia or flagella remain unknown. CP110, Cep97, Cep120, CPAP, SPICE1 and ce ...