On the other hand, deficiencies of the small Maf TFs Mafg (OMIM: 602020) and Mafk (OMIM: 600197) in specific combination of knockout alleles are linked to cataract (Agrawal et al., 2015), in addition to other developmental defects such as progressive neuronal degeneration and thrombocytopenia (Blank, 2008; Kannan et al., 2012; Katsuoka and Yamamoto, 2016). The gene discussed is MAFK; the disease is Thrombocytopenia.