There is no current information on the proteins making up the MIPs in the photoreceptor BB, though it is likely they are highly conserved because of (1) the similar shape and placement of the MIPs observed between previous mammalian maps and the photoreceptor centriole, and (2) the fact that mutations in many of these MIPs cause ciliopathies, which are often associated with blinding disease, for example, CFAP20 (Chrystal et al, 2022). Here, CFAP20 is linked to ciliopathy.