SNAI2 and melanoma: For RT‐PCR analyses, we chose melanophore marker genes pmel [29] and mitf [30], neural crest markers sox10 and slug that can be reactivated in invasive melanomas [31], melanoma‐enriched genes bcl2 [32] and axl [33], and cdh1 (E‐cadherin gene), of which expression was decreased in invasive melanomas [34].