Heterologous proteins could be expressed directly in the cytoplasm, secreted into the periplasmic space or extracellular medium.

大肠杆菌中外源蛋白可定位于胞内、周质或胞外培养基中。

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Those genes with increased expression level in aging lung mainly related to cytoskeleton or extracellular matrix, inflammation or stress response, tumor, signal transduction and so on.

上调为主的有：细胞骨架和胞外基质、炎性应激反应、肿瘤相关、信号转导等；

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So, basically, in order to move, a cell climbs hand-over-hand along the extracellular matrix until it reaches a blood or lymphatic vessel and penetrates it. From there, it's smooth sailing.

基本而言，细胞顺着细胞外基质移动，一旦发现血管或淋巴管，穿透血管和淋巴管，这样就畅通无阻了。

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The extracellular matrix or the collagen gel gives the tissue integrity, and in part, determines its mechanical properties.

细胞外基质或者说胶原蛋白凝胶,使组织成为一个整体,在某种程度上,决定了组织的机械性能

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It could be those differences that they experience in their extracellular environment that lead to their choice to either self-renew or to become committed.

有可能就是由于,这种细胞外环境的不同,最终导致它们自我更新,或者成为定向的祖细胞

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So, this is called the extracellular region or domain, this is the trans-membrane region or domain, and this is the cytoplasmic region or domain.

因此,这部分叫做胞外区,中间这部分叫做跨膜区,内部这一段叫做胞质区

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