这些研究人员随后在胚胎第12.5天(embryonic day 12.5, E12.5)移除小鼠胚胎心脏中的经过谱系标记的内皮细胞,开展进一步的分析。统计学关联与解剖关系是相一致的。值得注意的是,胚胎细胞在血液开始流动之前就显示出向动脉命运的转换,因而这些细胞就被称为前动脉细胞(pre-artery cell)。
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