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liuqingrui5金蟲 (小有名氣)
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[求助]
NCBI數(shù)據(jù)庫里給出的蛋白分子量時整個蛋白分子量還是一個亞基分子量呢
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| NCBI數(shù)據(jù)庫里給出的蛋白分子量時整個蛋白分子量還是一個亞基分子量呢? |
分子生化實驗經(jīng)驗積累 |
榮譽版主 (著名寫手)
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專家經(jīng)驗: +24 |
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你可以通過交聯(lián)的方法來測定是幾聚體,給你個參考文獻: Cross-linking To cross-link free amino groups of Myc-tagged CUTA protein, the HeLa-CUTA cells were lysed in the lysis buffer (5 mM EDTA, 0.2% Triton-x-100, 58 mM Na2HPO4, 17 mM NaH2PO4, 68 mM NaCl). Then 100 ll of cell lysate was incubated with disuccinimidyl glutarate (DSG) (Pierce) of different concentration for 1 h on ice. The reaction was quenched with 10 mM Tris (pH 7.4) and the protein samples diluted in 5· loading buffer (Tris–HCl (pH 6.8), 0.25% bromophenol blue, 2% SDS, 10% glycerol, 0.1 M DTT) were run on a 12% SDS-polyacrylamide gel for Western blot analysis. 出處:http://www.ncbi.nlm.nih.gov/pubmed/17924204 |

榮譽版主 (著名寫手)
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專家經(jīng)驗: +24 |
| 最好貼出鏈接,舉例說明,如果是NP_這種參考序列,他給出的分子量就純粹是氨基酸序列計算出來的推測分子量,你知道,有時候蛋白分子存在各種修飾,實際分子量多大要靠具體實驗來測定 |

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