Despite their presence in certain BC types, genetic ablation of CaBP1, CaBP2, or CaBP5 surprisingly does not significantly alter either the overall retinal morphology or the b-wave amplitudes of electroretinograms (ERGs), the latter of which reflect the light-induced activities in BCs (Rieke et al., 2008; Sinha et al., 2016). This evidence concerns the gene CABP5 and breast cancer.