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[求助]G418加入到培养基中后培养基变黄,且高浓度下...
[求助]G418加入到培养基中后培养基变黄,且高浓度下...
大家好,最近要建立一个稳转细胞系,质粒什么的都已经构建好了,但是在确定G418筛选浓度实验中遇到了困难,实验步骤如下:买来的G418粉末,称取0.5gG418,加入5ml0.1M HEPES溶液,浓度为100 mg/ml完全溶解后,0.22 um过滤,-20度保存;将配制好的G418储存液按一定比例加入DMEM中,100ul加入到10ml的DMEM中,G418浓度为1000ug/ml, 但是加入G418后培养基迅速变黄,该用水配也是同样的现象,记得以前用的800ug/ml的G418培养基也是不变色的呀;下一步是筛选了,将培养基稀释成不同的浓度梯度100—1000ug/ml,加入到已经贴壁培养的293细胞中,一周以后任何浓度下的细胞都生长的好好的,没有任何死亡迹象,重复试验,加大浓度细胞依旧不死,实在是找不到原因了,特来请教各位大侠,请大家多多帮忙分析一下,救救我吧!谢谢谢谢
查看完整版本请点击这里:
[求助]G418加入到培养基中后培养基变黄,且高浓度下...
[求助]G418加入到培养基中后培养基变黄,且高浓度下...
最新回复
园丁## (2012-5-04 15:39:26)
还有就是G418是酸性的,你可以适当的调下pH值。不过呢,不去调问题也不是很大,因为细胞是耐酸不耐碱的,而很多细菌却是耐碱不耐酸。呵呵,放心去做吧。
one (2012-5-04 15:39:53)
bananapeople (2012-5-04 15:40:25)
wu11998866 (2012-5-04 15:42:41)
我觉得是G418的问题,你买的是那个公司的G418?
如果是原装的,就没有问题。
hyuu (2012-5-04 15:43:03)
后者的T就是G418筛出来的....
hepes是PH7.3的吗?
04906 (2012-5-04 15:43:31)
G418是2-8°C保存,所以放在4°C,避光!
one (2012-5-04 15:44:00)
是293T细胞呀,天啊,不会吧!!!293T细胞是用G418筛选建立的吗?有哪位战友有293T细胞的详细介绍呀,谢谢
66小飞侠 (2012-5-04 15:44:42)
详情请看ATCC:cuturl('http://www.atcc.org/ATCCAdvancedCatalogSearch/ProductDetails/tabid/452/Default.aspx?ATCCNum=CRL-11268&Template=cellBiology')
The 293T/17 cell line is a derivative of the 293T (293tsA1609neo) cell line. 293T is a highly transfectable derivative of the 293 cell line into which the temperature sensitive gene for SV40 T-antigen was inserted. 293T cells were cloned and the clones tested with the pBND and pZAP vectors to obtain a line capable of producing high titers of infectious retrovirus, 293T/17. These cells constitutively express the simian virus 40 (SV40) large T antigen, and clone 17 was selected specifically for its high transfectability.293T/17 cells were cotransfected with the pCRIPenv- and the pCRIPgag-2 vectors to obtain the ANJOU 65 (see ATCC CRL-11269) cell line.ANJOU 65 cells were cotransfected with the pCRIPgag-2 and pGPT2E vectors to obtain the BOSC 23 (see ATCC CRL-11270) ecotropic envelope-expression packaging cell line.ANJOU 65 cells were also cotransfected with the pCRIPAMgag vector along with a plasmid expressing the gpt resistance gene to obtain the Bing (see ATCC CRL-11554) amphotropic envelope-expression packaging cell line.
57448: Pear WS, et al. Production of High-Titer Helper-Free Retroviruses by Transient Transfection. Proc. Natl. Acad. Sci. USA 90: 8392-8396, 1993. PubMed: 7690960
glass (2012-5-04 15:47:06)
293t本身就是g418抗性
正常情况下培养293t应含少量g418筛选
另:高浓度g418加入培养基变黄很正常
star#room (2012-5-04 15:47:58)
“ By the way, if you use vector with G418 resistent, DO NOT
use 293T, since 293T is stable incorperated SV40 large T antigen, it grow
so fast that G418 could not kill the non-transfected cell. so using G418 in
293T is useless.”
这是我一个很有经验的人给我的建议.
供参考.
[求助]G418加入到培养基中后培养基变黄,且高浓度下...