Figure 1. Phenotypic response of Mo^{Br /y} mice to copper injection.

Mice were photographed before and after copper treatment to exemplify the dramatic phenotypical changes that occur in the mutants. (A) 7-day-old male mice prior to treatment. Mutant males are pink. (B) 8-day-old mice after first Cu injection. (C) 9-day-old mice after second Cu injection. (D) 3-month-old WT male. (E) 3-month-old copper-treated Mo^{Br /y} male. In panels A, B & C, untreated WT littermates are shown for comparison.