To determine the mechanisms implicated in Snail1 contribution to melanoma growth, we isolated tdTomato+PDGFRα+ cells from BrafV600E-5555 tumours grown in Snail1ME-WT and Snail1ME-KO mice after tamoxifen treatment and performed RNA sequencing (Fig. 2d, Supplementary Fig. 3a). The gene discussed is PDGFRA; the disease is melanoma.