聚乙烯亞胺(Polyethylenimine,PEI)分為線性和分枝狀兩種,線性聚乙烯亞胺包含的全是仲胺,而分枝狀聚乙烯亞胺中有伯胺、仲胺和叔胺基。任何分子量的線性聚乙烯亞胺在常溫下是固體,而分枝狀聚乙烯亞胺是液體。線性PEI可溶于熱水中或低pH的甲醇、乙醇或氯仿中,但不溶于冷水、苯、乙醚和丙酮;聚合物鏈的一端是甲基,另一端是氨基;熔點(diǎn)為73-75℃;可貯存在室溫中。
應(yīng)用
附著力促進(jìn)劑
單體乙烯亞胺的結(jié)構(gòu)
聚乙烯亞胺在細(xì)胞培養(yǎng)中可增強(qiáng)黏附力較弱的細(xì)胞的黏附力。PEI是陽(yáng)離子聚合物,細(xì)胞外表面的負(fù)電荷附著到覆蓋有PEI的培養(yǎng)皿底面,為細(xì)胞和平板之間提供了更強(qiáng)的附著力。不過(guò),聚乙烯亞胺有很強(qiáng)的細(xì)胞毒性。[1]
轉(zhuǎn)染試劑
聚乙烯亞胺是歷史上繼多聚賴(lài)氨酸之后發(fā)現(xiàn)的第二種聚合物轉(zhuǎn)染試劑[2]。PEI能將DNA縮合成帶正電荷的微粒,這些微??梢责ず系綆в胸?fù)電荷的細(xì)胞表面殘基,并通過(guò)胞吞作用進(jìn)入細(xì)胞。一旦進(jìn)入細(xì)胞,胺的質(zhì)子化導(dǎo)致反離子大量涌入以及滲透勢(shì)降低。上述變化導(dǎo)致的滲透膨脹使囊泡釋放聚合物與DNA形成的復(fù)合物(polyplex)進(jìn)入細(xì)胞質(zhì)。復(fù)合物拆解后,DNA就能自由的融合到細(xì)胞核中。[3][4]PEI有很強(qiáng)的細(xì)胞毒性[5],作用機(jī)理分為兩種[6],一種是使細(xì)胞膜破碎導(dǎo)致(即刻的)細(xì)胞壞死,另一種是在胞吞后導(dǎo)致線粒體膜破碎,最終導(dǎo)致(延遲的)細(xì)胞凋亡。
線性PEI可通過(guò)水解聚(2-乙基-2-惡唑啉)合成[7]并以jetPEI的名稱(chēng)銷(xiāo)售[。目前這一代的in-vivo-jetPEI使用定制的聚(2-乙基-2-惡唑啉)復(fù)合物作為前體。
產(chǎn)品編號(hào) |
品名 |
包裝 |
規(guī)格 |
價(jià)格含稅 |
品牌 |
購(gòu)買(mǎi)數(shù)量 |
點(diǎn)擊購(gòu)買(mǎi) |
E107077-100g |
聚乙烯亞胺 |
100g |
M.W. 600,99% |
¥598 |
aladdin |
|
|
|
E107077-18kg |
聚乙烯亞胺 |
18kg |
M.W. 600,99% |
¥39800 |
aladdin |
|
|
|
E107077-25g |
聚乙烯亞胺 |
25g |
M.W. 600,99% |
¥159 |
aladdin |
|
|
|
E107077-500g |
聚乙烯亞胺 |
500g |
M.W. 600,99% |
¥2170 |
aladdin |
|
|
|
E107078-18kg |
聚乙烯亞胺 |
18kg |
M.W. 1800,99% |
¥39800 |
aladdin |
|
|
|
E107078-25g |
聚乙烯亞胺 |
25g |
M.W. 1800,99% |
¥159 |
aladdin |
|
|
|
E107078-500g |
聚乙烯亞胺 |
500g |
M.W. 1800,99% |
¥2156 |
aladdin |
|
|
|
E107079-100g |
聚乙烯亞胺 |
100g |
M.W. 10,000,99% |
¥786 |
aladdin |
|
|
|
E107079-25g |
聚乙烯亞胺 |
25g |
M.W. 10,000,99% |
¥169 |
aladdin |
|
|
|
E107079-500g |
聚乙烯亞胺 |
500g |
M.W. 10,000,99% |
¥2376 |
aladdin |
|
|
|
E107080-100g |
聚乙烯亞胺 |
100g |
M.W. 70,000,50%水溶液 |
¥129 |
aladdin |
|
|
|
E107080-25g |
聚乙烯亞胺 |
25g |
M.W. 70,000,50%水溶液 |
¥89 |
aladdin |
|
|
|
E107080-25kg |
聚乙烯亞胺 |
25kg |
M.W. 70,000,50%水溶液 |
¥7900 |
aladdin |
|
|
|
E107080-500g |
聚乙烯亞胺 |
500g |
M.W. 70,000,50%水溶液 |
¥457 |
aladdin |
|
|
|
E107078-100g |
聚乙烯亞胺 |
100g |
M.W. 1800,99% |
¥469 |
aladdin |
|
|
|
40529 |
聚乙烯亞胺, branched, M.W. 70,000, 30% w/v aq. soln. |
500g |
|
¥5432 |
Alfa |
|
|
|
40331 |
聚乙烯亞胺, branched, M.W. 10,000, 99% |
25g |
|
¥350 |
Alfa |
|
|
|
40331 |
聚乙烯亞胺, branched, M.W. 10,000, 99% |
100g |
|
¥1120 |
Alfa |
|
|
|
40331 |
聚乙烯亞胺, branched, M.W. 10,000, 99% |
500g |
|
¥4480 |
Alfa |
|
|
|
40528 |
聚乙烯亞胺 |
25g |
branched, M.W. 1,800, 99% |
¥290 |
Alfa |
|
|
|
40528 |
聚乙烯亞胺, branched, M.W. 1,800, 99% |
100g |
|
¥834 |
Alfa |
|
|
|
40528 |
聚乙烯亞胺, branched, M.W. 1,800, 99% |
500g |
|
¥3332 |
Alfa |
|
|
|
40529 |
聚乙烯亞胺, branched, M.W. 70,000, 30% w/v aq. soln. |
25g |
|
¥384 |
Alfa |
|
|
|
40529 |
聚乙烯亞胺, branched, M.W. 70,000, 30% w/v aq. soln. |
100g |
|
¥1266 |
Alfa |
|
|
|
45024 |
聚乙烯亞胺, branched, M.W. 50,000 - 100,000, 30% w/w aq. soln. |
25g |
|
¥452 |
Alfa |
|
|
|
45024 |
聚乙烯亞胺, branched, M.W. 50,000 - 100,000, 30% w/w aq. soln. |
100g |
|
¥1428 |
Alfa |
|
|
|
45024 |
聚乙烯亞胺, branched, M.W. 50,000 - 100,000, 30% w/w aq. soln. |
500g |
|
¥6567 |
Alfa |
|
|
|
40527 |
聚乙烯亞胺, branched, M.W. 600, 99% |
25g |
|
¥260 |
Alfa |
|
|
|
40527 |
聚乙烯亞胺, branched, M.W. 600, 99% |
100g |
|
¥816 |
Alfa |
|
|
|
40527 |
聚乙烯亞胺, branched, M.W. 600, 99% |
500g |
|
¥3430 |
Alfa |
|
|
|
43896 |
聚乙烯亞胺, linear, M.W. 25,000 |
250mg |
|
¥241 |
Alfa |
|
|
|
43896 |
聚乙烯亞胺, linear, M.W. 25,000 |
1g |
|
¥858 |
Alfa |
|
|
|
45594 |
聚乙烯亞胺, branched, M.W. 1,200, 99% |
25g |
|
¥322 |
Alfa |
|
|
|
45594 |
聚乙烯亞胺, branched, M.W. 1,200, 99% |
100g |
|
¥1050 |
Alfa |
|
|
|
45594 |
聚乙烯亞胺, branched, M.W. 1,200, 99% |
500g |
|
¥4965 |
Alfa |
|
|
|
764604-1G |
聚乙烯亞胺 |
1g |
average Mn 2,500, PDI <1.2 |
¥1306 |
Aldrich |
|
|
|
178572500 |
聚乙烯亞胺 |
250g |
approx. M.W. 60,000, 50 wt% aq. solution, branched |
¥972 |
ACROS |
|
|
|
178570010 |
聚乙烯亞胺 |
1KG |
approx. M.W. 60,000, 50 wt% aq. solution, branched |
¥2625 |
ACROS |
|
|
|
764582-1G |
聚乙烯亞胺 |
1g |
linear average Mn 5,000, PDI <1.2 |
¥758 |
Aldrich |
|
|
|
765090-1G |
Polyethylenimine |
1g |
linear average Mn 10,000, PDI ≤1.2 |
¥1297 |
Aldrich |
|
|
|
178571000 |
聚乙烯亞胺 |
100g |
approx. M.W. 60,000, 50 wt% aq. solution, branched |
¥464 |
ACROS |
|
|
|
408727-100ml |
支化聚乙烯亞胺 |
100ml |
average Mw ~25,000 by LS, average Mn ~10,000 by GPC, branched |
¥839 |
Aldrich |
|
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