NRN1 and melanoma: After sub-cloning NRN1 into the eukaryotic expression vector pCDNA3 we stably transfected the melanoma cell line Mel Ju and proved the over-expression on mRNA and protein level in two different cell clones (NRN1_a and NRN1_b) compared to two controls (ctrl a and ctrl b) (Supplementary Figure S4A and S4B).