mortality/aging
• embryos die around midgestation
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embryo
• homozygotes fail to undergo turning
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• at somite stages, anterior development arrests; embryos rarely develop beyond 15 somites
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• at sheadfolds appear narrower than normal at ~E9.5
• neurectoderm truncation extends to the anterior limit of its expression at rhombomere 2
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nervous system
• at sheadfolds appear narrower than normal at ~E9.5
• neurectoderm truncation extends to the anterior limit of its expression at rhombomere 2
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• mutants have a reduced head
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