mortality/aging
• no live conditional null mice are found at 4 weeks after birth; embryos at E10.5; mice display identical phenotype to Cxadrtm1.1Mds homozygotes
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cardiovascular system
• at E10.5, engorgement of the cardinal veins is apparent
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• hyperplasia of proximal heart tube is seen at E10.5
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• sinuatrial valves, located at the junction between sinus venosus and atrium in wild-type embryos, are absent
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