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endoderm n.【生物學】內胚層。

endodermis

Whole mount in situ hybridization showed that amphihmgb transcripts were present ubiquitously in the early embryos from zygote to neurula , but they decreased gradually in mesoderm and endoderm and neural tube with development , and became restricted to epidermal cells in the hatched larva . it appear s that hmgb plays a role in the mitosis and differentiation of embryonic cells . another amphioxus cdna , amphiubf80 , encoding ubiquitin / ribosomal fused protein s27a , was isolated from the gut cdna library of b . belcheri tsingtauense S004cdna序列編碼一個156個氨基酸殘基組成的蛋白質,與人的泛素蛋白ubf80具有較高的氨基酸序列同源性( 145 / 156同源) ,且該蛋白具有泛素蛋白ubf80所共有的兩個結構域,即由72個氨基酸組成的泛素介導的蛋白降解結構域和由48個氨基酸組成的核糖體蛋白s27a結構域。

These congenital lesions arise from abnormal separation of the endoderm and neuroectoderm during embryogenesis 這些先天性的異常是因為再胚胎發育時,內胚層與神經外胚層不正常的分離所造成的。

The astrocyte marker gfap and oligodendrocyte marker mbp were not detected . nor the endoderm and mesoderm markers 膠質細胞標志基因gfap 、 mbp未檢測到,其他胚層的標志性基因也沒有表達。

These epithelial elements arise embryologically from foregut endoderm in the process of bronchial tubular growth . 這些表皮細胞在胚胎學上把源于支氣管生長過程中的前內臟叫內胚層。