形态发生素(morphogen)
关键词: 形态发生素 morphogen来源: 互联网
携带决定细胞分化方向相关信息的可扩散的物质。形态发生素是以连续的浓度梯度分布的,因而形成各种浓度阈值,细胞根据所处环境的形态发生素的浓度阈值决定分化方向。形态发生素是决定细胞发育的基因表达产物,如果蝇中的合子基因。
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