mortality/aging
• the 30% surviving the first 24 hours after birth live for 5-10 days
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• 70% of animals died within 24 hours of birth
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growth/size/body
• severely runted compared to littermates
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nervous system
• absence of r3 in E9.0 embryos
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• absence of r5 in E9.0 embryos
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• less condensed than wild-type and overlapped with the trigeminal ganglion
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• less condensed than wild-type and overlapped with the facial/acoustic ganglion
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embryo
• absence of r3 in E9.0 embryos
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• absence of r5 in E9.0 embryos
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