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Growth curves of wild-type and nkd1 and nkd2 mutant mice. Shown are mean weights ± standard deviations for the indicated numbers of male (top) and female (bottom) mice at the indicated postnatal weeks of age. At 12 weeks, nkd1lacZ/lacZ but not nkd2lacZ/lacZ mice are significantly smaller than wild-type mice, with P values indicated.
