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714850835鐵蟲 (初入文壇)
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[求助]
怎么分離抗體和與抗體連接好的材料
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| 將抗體與我們制備的材料(~50nm)用的EDC和NHS連接,最后怎樣才能把沒連上抗體的洗掉,得到比較純的連接物呢? the free non-conjugated QDs and byproduct isourea were removed by ultrafiltration using 100 K Nanosep centrifugal devices by centrifugation at 5000 rmp for 15 min.The lower phase, contain-ing free QDs and isourea, were discarded. To wash the conju-gate and reduce the impurities, the upper phase, containing QD-IgG, was diluted by 300 L PBS buffer, and additionally subjected to centrifugation at 5000 rmp for 15 min. This washing step was repeated twice. The conjugate was recovered by 100 L of PBS and transferred to a new Eppendorf tube and then stored at 4 °C in a dark until use. 實(shí)驗(yàn)剛起步,覺得ODs-lgG的大小跟ODs的差不多耶,因該混在一起吧,不理解文獻(xiàn)中的方法。謝謝各位師兄師姐指點(diǎn)~ |
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鐵蟲 (初入文壇)
金蟲 (著名寫手)

鐵蟲 (初入文壇)
金蟲 (著名寫手)

鐵蟲 (初入文壇)
金蟲 (著名寫手)
| 他們進(jìn)行了超濾分離, "the free non-conjugated QDs and byproduct isourea were removed by ultrafiltration using 100 K Nanosep centrifugal devices by centrifugation at 5000 rmp for 15 min" 也就是說用離心的方法,離心管是套式的(大離心管里面有小離心管,中間有濾膜的那種),這個跟做PCR之前的核酸提取方法差不多,標(biāo)記好的QDs留在了上層里,free的濾到了下層(The lower phase, contain-ing free QDs and isourea, were discarded.)。 |

鐵蟲 (初入文壇)
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