Objective To observe contineously on the cell surface molecule of Dexter culture of cord CD34 + cells in vitro.

目的：探讨骨髓间充质干细胞对脐血CD34+细胞诱导分化为巨核细胞的影响。

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Once the receptor has seized a molecule, it binds the molecule to the cell surface from where it is taken into the cell.

一个受体一旦钩上了一个分子，就把那个分子固定在细胞表面，然后从那里把它摄入细胞内。

youdao

No tumor cell, so far as is known, produces a specific surface molecule for toxins to act on.

就目前所知，没有肿瘤细胞有能使毒素作用的特殊表面分子。

youdao

So, it doesn't need to bind to a receptor on the surface of the cell in order to work because the molecule can actually enter the cell directly.

所以无需与细胞表面受体相结合来起效,因为这些分子能直接进入细胞

耶鲁公开课 - 生物医学工程探索课程节选

In this case, a receptor tyrosine kinase is a receptor molecule that binds a ligand at its surface outside the cell and initiates this enzyme activity - this kinase activity - and causes phosphorylation of another molecule.

在这个例子中,酪氨酸激酶受体可以,在细胞表面区域与配体结合,从而激发出,激酶的活性,使其能够磷酸化另一类分子

耶鲁公开课 - 生物医学工程探索课程节选