| 4 | 1/1 | 返回列表 |
| 查看: 1223 | 回復(fù): 3 | |||
lizhijiang木蟲 (著名寫手)
|
[交流]
蛋白酶活性測定-酶譜法 已有3人參與
|
|
酶譜法是測定蛋白酶活性的一種敏感方法之一,是用含蛋白酶作用底物的蛋白制成的分離膠,由于酶解作用使膠中相應(yīng)底物發(fā)生分解,致使酶解部分背景透明;也可檢測酶對casein或特異性底物作用的方法之一。 現(xiàn)將文獻(xiàn)和本人寫作中提到的酶方法做一簡要英文介紹。簡言之,與SDS-PAGE法有極其類似之處。區(qū)別在于,酶譜法:1、樣品不用煮沸。2、在分離膠中取出部分水溶解casein或特異性蛋白底物,制成含0.1或0.5%酶作用底物的分離膠(再在分離膠中加入所需的分離膠制備用水)。3、酶作用的底物嵌于分離膠中,因此與普通SDS-PAGE膠相比,膠空隙更小。因此,不可用marker,因?yàn)榉蛛x膠中遍布蛋白底物,染色后除酶解部位是透明顏色,而其他部分藍(lán)色。4、電泳后,孵育過程很重要,所以溶液配制中,尤其鈣離子激活酶活很重要;染色、脫色與sds-page差別不大。 如有疑問,可在回帖中交流。不當(dāng)之處請指導(dǎo)。 Zymography The proteolytic zymography was performed in conjunction with SDS-PAGE according to the modified method of García-Carreño et al. and Laemmli. Ten percent separating gel was prepared in the presence of the final concentration of 0.1% casein or specific substrate, respectively. The enzyme, or specific enzyme were loaded on the 5% stacking gel and run electrophoresis. After electrophoresis, the gels were rinsed in distilled water and eluted for 40 min in a shaking water bath with 50 mmol/L Tris-HCl (pH 7.6) containing 2.5% Triton X-100 and 5 mmol/L CaCl2. Subsequently, the casein- and specific substrate -zymography gel were washed with 50 mmol/L Tris-HCl (pH 7.6) containing 5 mmol/L CaCl2 for 40 min and incubated with 50 mmol/L Tris-HCl (pH 7.4) containing 150 mmol/L NaCl, 10 mmol/L CaCl2, and 0.02% NaN3 at 37 ℃ for 42 h. Then the gels were stained by Coomassie brilliant blue R-250 for 3 h and rinsed by the destainer containing 40% ethanol and 10% acetic acid. |

木蟲 (著名寫手)
鐵蟲 (初入文壇)

| 4 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 一志愿吉林大學(xué)材料學(xué)碩321求調(diào)劑 +9 | Ymlll 2026-03-18 | 12/600 |
|
|---|---|---|---|---|
|
[考研] 085601材料工程專碩求調(diào)劑 +10 | 慕寒mio 2026-03-16 | 10/500 |
|
|
[考研] 266求調(diào)劑 +5 | 陽陽哇塞 2026-03-14 | 10/500 |
|
|
[考研] 085600材料與化工調(diào)劑 324分 +10 | llllkkkhh 2026-03-18 | 12/600 |
|
|
[考研] 287求調(diào)劑 +3 | 晨昏線與星海 2026-03-19 | 4/200 |
|
|
[考研] 281求調(diào)劑(0805) +9 | 煙汐憶海 2026-03-16 | 19/950 |
|
|
[考研] 330求調(diào)劑 +3 | 小材化本科 2026-03-18 | 3/150 |
|
|
[考研] 311求調(diào)劑 +6 | 26研0 2026-03-15 | 6/300 |
|
|
[考研] 一志愿西南交大,求調(diào)劑 +4 | 材化逐夢人 2026-03-18 | 4/200 |
|
|
[考研]
|
胡辣湯放糖 2026-03-15 | 6/300 |
|
|
[考研] 0703化學(xué)調(diào)劑 +3 | 妮妮ninicgb 2026-03-17 | 3/150 |
|
|
[考研] 265求調(diào)劑 +3 | 梁梁校校 2026-03-17 | 3/150 |
|
|
[考研] 301求調(diào)劑 +9 | yy要上岸呀 2026-03-17 | 9/450 |
|
|
[考研] 268求調(diào)劑 +8 | 一定有學(xué)上- 2026-03-14 | 9/450 |
|
|
[考研] 275求調(diào)劑 +4 | 太陽花天天開心 2026-03-16 | 4/200 |
|
|
[考研] 東南大學(xué)364求調(diào)劑 +5 | JasonYuiui 2026-03-15 | 5/250 |
|
|
[考研] 304求調(diào)劑 +4 | ahbd 2026-03-14 | 4/200 |
|
|
[考研] 一志愿211 0703方向310分求調(diào)劑 +3 | 努力奮斗112 2026-03-15 | 3/150 |
|
|
[考研] 求老師收留調(diào)劑 +4 | jiang姜66 2026-03-14 | 5/250 |
|
|
[考研] 中科大材料專碩319求調(diào)劑 +3 | 孟鑫材料 2026-03-13 | 3/150 |
|