mortality/aging
• early lethality avoided if doxycycline induction delayed until E9.5
• complete lethality around E10 when foster mothers treated with doxycycline throughout development
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embryo
• mesoderm development arrested by E12.5 when doxycycline treatment of foster mothers delayed until E9.5
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• posterior development arrested early when foster mothers treated with doxycycline throughout development
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• excessive neural tissue at the caudal end of the embry when foster mothers are treated with doxycycline throughout development
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• absence of notochord caudal to mid brain at E9.5 when foster mothers treated with doxycycline throughout development
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• notochord development arrested at the mid tail level by E12.5 when doxycycline treatment of foster mothers begins ast E9.5
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• few irregularly shaped somites when foster mothers treated with doxycycline throughout development
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• absence of allantois derivatives when foster mothers treated with doxycycline throughout development
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nervous system
• excessive neural tissue at the caudal end of the embry when foster mothers are treated with doxycycline throughout development
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