| 3 | 1/1 | 返回列表 |
| 查看: 620 | 回復: 3 | ||||
| 本帖產生 2 個 MicEPI ,點擊這里進行查看 | ||||
| 當前只顯示滿足指定條件的回帖,點擊這里查看本話題的所有回帖 | ||||
zhangpamela木蟲 (小有名氣)
|
[求助]
酶的分離純化
|
|||
| 我要純化一種從細菌提取出來的未知粗酶,鹽析后上離子交換,等電點未知,我準備選用DEAE-sephroseFF 填料試一試,但不知道選什么緩沖液,pH調為多少?不知道這種填料合適不?100ml的填料能用幾次?還挺貴的,一般這種未知的是首選陰離子呢還是陽離子? |
專家顧問 (知名作家)
生物大分子降解酶
![]() |
專家經驗: +248 |
|
先做粗酶液pH穩(wěn)定性的實驗,確定了穩(wěn)定范圍之后再選擇層析柱。 Effect of pH and temperature on glucoamylase activity and stability The effect of pH on glucoamylase activity is measuring glucoamylase activity at different pH value of pH 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0 at 37ºC. The effect of temperature on glucoamylase activity is measuring glucoamylase activity at different temperature of 25, 30, 35, 40, 45, 50, 55 and 60ºC at optimum pH. The effect of pH on glucoamylase stability was conducted by mixing 0.1mL enzyme with 0.9mL 0.1M buffer in different pH value (The buffers used were: citrate-phosphate buffer, pH 3.0–7.0; sodium-phosphate buffer, pH 6.0–8.0; Tris-HCl buffer, pH 7.0–9.0; and glycine-NaOH buffer, pH 8.5–12.0). The mixtures were incubated at 4ºCfor 24h, and the residue enzyme activity were measured. The effect of temperature on enzyme stability was conducted by incubating enzyme at 30, 35, 40, 45, and 50ºC for 1 h, and the residue enzyme activity were measured. Each result of the character assay was showed by a scatter diagram with trend line, the highest activity was defined as 100%, other activity was defined as relative activity. The error bars represent the standard deviation of triplicate measurements. |

專家顧問 (知名作家)
生物大分子降解酶
![]() |
專家經驗: +248 |

| 3 | 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] 284求調劑 +3 | 小熊~~ 2026-03-31 | 3/150 |
|
|---|---|---|---|---|
|
[考研] 一志愿華東師范大學有機化學專業(yè),初試351分,復試被刷求調劑! +7 | 真名有冰 2026-03-29 | 8/400 |
|
|
[考研]
|
鐘llll 2026-03-26 | 5/250 |
|
|
[考研] 085600 286分 材料求調劑 +11 | 麻辣魷魚 2026-03-27 | 12/600 |
|
|
[考研] 085601材料工程找調劑 +17 | oatmealR 2026-03-29 | 18/900 |
|
|
[考研] 0703化學求調劑 +6 | 丹青奶蓋 2026-03-26 | 8/400 |
|
|
[考研] 329求調劑,一志愿西北工業(yè)大學,材料工程(085601) +5 | 小小機靈蟲 2026-03-29 | 11/550 |
|
|
[考研] 332求調劑 +6 | Lyy930824@ 2026-03-29 | 6/300 |
|
|
[考研] 材料與化工304求B區(qū)調劑 +4 | 邱gl 2026-03-26 | 7/350 |
|
|
[考研] 318一志愿吉林大學生物與醫(yī)藥 求調劑 +5 | 篤行致遠. 2026-03-28 | 5/250 |
|
|
[考研] 085600,材料與化工321分求調劑 +10 | 大饞小子 2026-03-28 | 10/500 |
|
|
[考研] 275求調劑 +15 | Micky11223 2026-03-25 | 20/1000 |
|
|
[考研] 一志愿南昌大學324求調劑 +5 | hanamiko 2026-03-29 | 5/250 |
|
|
[考研] 本科新能源科學與工程,一志愿華理能動285求調劑 +7 | AZMK 2026-03-28 | 11/550 |
|
|
[考研] 320分,材料與化工專業(yè),求調劑 +9 | 一定上岸aaa 2026-03-27 | 13/650 |
|
|
[考研] 394求調劑 +3 | 好事多磨靜候佳?/a> 2026-03-26 | 5/250 |
|
|
[考研] 086000調劑 +3 | 7901117076 2026-03-26 | 3/150 |
|
|
[考研] 中國科學院深圳先進技術研究院-光纖傳感課題組招生-中國科學院大學、深圳理工大學聯培 +5 | YangTyu1 2026-03-26 | 5/250 |
|
|
[考研] 293求調劑 +7 | 加一一九 2026-03-24 | 7/350 |
|
|
[考研] 086003食品工程求調劑 +6 | 淼淼111 2026-03-24 | 6/300 |
|