MITF and melanoma: In zebrafish, expression of HRASV12 from the mitfa promoter (Michailidou et al., 2009), from the kita promoter (Anelli et al., 2009), or when expressed throughout the fish at low levels (Santoriello et al., 2009), reveals the potential for HRASV12 to promote both ectopic melanocytes and melanoma.