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[求助]
幾句論文求大神翻譯成中文 謝謝
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Another issue that needs to be explained is that the PHBVPEGMAL surface (Figure 3c) does not suppress the cell growth significantly as we expected because of the presence of PEG if comparedwithPHBV- NH2 and PHBV-RGDsurfaces (Figure 3a,d). The reason is likely to be the reactive maleimide groups at the end of PEG. The maleimide group reacts specifically with sulfhydryl groups when the pHof the reaction mixture is between pH 6.5 and 7.5 and forms a stable thioether linkage. Because sulfhydryls are present in most proteins and the cell culturemedium containsmany proteins, it is very possible that the proteins in the culturemedium are chemically bound to the end of PEG by maleimide groups, further promoting cell adhesion and proliferation. |
金蟲 (著名寫手)
| 另一個(gè)需要加以說明的問題,如我們所料,與PHBVNH2和PHBV-RGD表面(圖3a,d)相比較,PHBVPEGMAL表面(圖3c)由于PEG的存在不會明顯抑制細(xì)胞生長(圖3a,d)。這可能是由于在PEG末端的反應(yīng)性的順丁烯二酰亞胺基團(tuán)的原因。反應(yīng)混合物pH值處于6.5和7.5之間時(shí),順丁烯二酰亞胺基團(tuán)與硫氫基進(jìn)行特定的反應(yīng)并形成一個(gè)穩(wěn)定的硫醚鍵。 因?yàn)閹基存在于大部分蛋白質(zhì)之中并且細(xì)胞培養(yǎng)基中含有大量蛋白質(zhì),完全可能的是培養(yǎng)基中的蛋白質(zhì)通過順丁烯二酰亞胺基團(tuán)化學(xué)鍵合到PEG的末端,進(jìn)一步地促進(jìn)細(xì)胞粘附和繁殖。 |
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