mortality/aging
• mutants are alive at E17.5 but do not survive birth
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skeleton
• skeletal defects are more severe than in mice homozygous for Phc2 only
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• the dorsal part of the occipital bone is floating
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• there is a hole in the scapula
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• the 6th ribs are detached from the sternum
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• anterior processes are associated with the 5th cervical vertebra (C5)
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craniofacial
• the dorsal part of the occipital bone is floating
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digestive/alimentary system
growth/size/body