Antigen interacts with the surface of sensitized mast cells.

抗原与致敏的肥大细胞表面互相作用。

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Antigen density on the tumor cell surface influences the cytotoxic sensitivity.

瘤细胞表面的抗原密度影响细胞毒的敏感性。

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Cells in the cell membrane there are many different signs, mainly on the surface and surface antigen receptor.

细胞的细胞膜上有许多不同的标志，主要是表面抗原和表面受体。

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They might ingest extracellular antigen, presented pieces of it on their cell surface in the context of MHC-2.

它们可以吞噬胞外抗原,根据细胞表面的,主要组织相容性抗原-2

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Then, your muscle cells would start producing Hepatitis B surface antigen and your immune system recognizing that's a foreign protein would start responding to it.

于是,肌肉细胞将会,开始制造乙肝表面抗原,然后免疫系统就会识别出,那是外来蛋白质并且产生免疫应答

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Yeast cells were grown in large numbers with this plasmid inside, they expressed the plasmid and so you made Hepatitis B surface antigen not in people but in cell culture where it was not normally formed.

体内携带这种质粒的酵母细胞大量增殖,它们表达质粒,因此,乙型肝炎表面抗原不是在人体内,而是在细胞培养环境下,以非正常方式形成的

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So it ought to be possible to test for the presence of a certain antigen on a surface by dragging a suitable antibody over it, and seeing if it gets stuck going fishing, in effect, on a molecular scale.

ECONOMIST: Microscopy

However, before the alarm can be sounded in this way, proteins on the surface of the antigen-presenting cell and the T cell must bind together in what is called a cellular handshake.

ECONOMIST: Breaching the body's defences

As the tip continued its movement across the surface, the antibody was snapped off the antigen and dragged along until it hit another receptive site.

ECONOMIST: Microscopy