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Genetic interactions of Notch1 and Notch4 mutations. Growth curve of Notch1+/− Notch4−/− (♦,⋄) vs. Notch1+/+ Notch4−/− (▪, □) littermates. The weights of Notch1+/− Notch4−/− and Notch1+/+ Notch4−/− mutant animals are plotted against age. Males (red) and females (green) are plotted separately. Data presented are from four mice in each group. Error bars indicate the s.d..
