Phenotypic variability within the 129/Sv strain.

<p>(A) Comparison of histological slides and radiography of 129/Sv heterozygotes at 3 months of age show phenotypic variation in this strain. Wild-type (+/+), asymptomatic (AS) and severely affected (SE) heterozygous mice. (B) Average mean linear intercept at 3 and 6 months of age (*P<0.42, **P<0.0006, ***P<0.006). (C) Average thickness of thoracic aortic media at 3 and 6 months of age (*P<0.33, **P<0.04, †P<0.8, ††P<0.01). (D) Average KR at 3 and 6 months (*P<0.03, **P<0.04). (MI) Mildly affected animals. The number of animals analyzed in each group (n) and the ages (3 m and 6 m represent 3 months and 6 months, respectively) are shown.</p>

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