respiratory system
• the basement membrane and collagen fibril morphology of cells in the newborn lung is abnormal
• however, homozygotes are viable and fertile with normal kidney, heart, liver, muscle, spleen, and testis morphology
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integument
• collagen fibrils are more disorganized and loosely packed in bundles compared to wild-type mice
• collagen fibrils are also covered with a diffuse material not seen in wild-type mice
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• thickness of the lamina densa is decreased in the epidermal basement membrane
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cellular
• thickness of the lamina densa is decreased in the epidermal basement membrane more obviously in newborns than in adults
• the basement membrane of cells in the newborn lung is also abnormal
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