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Sequence of injections of melanoma inhibitory activity (MIA) 1% solution in the tail of two different mice (A–F), first mouse; (G–L), second mouse. Every panel corresponds to a single set of injections. The depigmentation appears after the first second mouse; (H) or second first mouse; (C) set of injections and then spreads through the tail during the various sets of injections of the MIA protein.
