Figure 1From: Is Melanoma a stem cell tumor? Identification of neurogenic proteins in trans-differentiated cellsPhotographs of the cat melanoma cell cultures before and after trans-differentiation. A: Uninfected control melanoma cells 48 hours after culture. B & C: Two different cultures of trans-differentiated neuronal cells, 48–72 hours after infection with the endogenous feline retrovirus RD114.Back to article page