mortality/aging
• all homozygotes died on the first day after birth
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cellular
• E15.5 MEFs were completely resistant to Moloney murine leukemia virus infection
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growth/size/body
• weighed 25% less than wild-types or heterozygotes
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hematopoietic system
• anemia first became apparent at about E12.5 and persisted throughout development
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• erythroid precursors were reduced in bone marrow, spleen, and liver
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• the level of circulating erythrocytes was decreased by 53%
• reduced number of erythrocytes in bone marrow, spleen and liver of newborn mice
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• total hemoglobin was reduced by 67%
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• mean corpuscular hemoglobin was reduced by 29%
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• large increase in the number of circulating nucleated red blood cells (mostly intermediate and late normoblasts) in newborns
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• mature red blood cells are very pale, vary in size and have an irregular appearance
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• reticulocytes were morphologically abnormal and reduced in number
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