青霉素-链霉素-谷氨酰胺 (100X)

当不可替代的培养物被污染时，研究人员可能会试图控制或消除污染。

1.用户需要确定污染的来源是细菌、真菌、支原体，还是酵母。请点击此处(https://www.thermofisher.com/us/en/home/references/gibco-cell-culture-basics/biological-contamination/bacterial-contamination.h%E2%84%A2l)阅读更多信息，以了解每一种污染的特性。
2.把受污染的培养物跟其他细胞系进行隔离。
3.使用一款实验室消毒剂清洁培养箱和层流柜，并检查HEPA过滤器。
4.高浓度的抗生素和抗真菌剂可能对一些细胞系有毒性。因此，需进行剂量效应测试来确定何种浓度水平的抗生素或抗真菌会造成毒性。这一操作对于使用Gibco Fungizone一类的抗真菌剂或泰乐菌素一类的抗生素尤其重要。

下列操作为我们确定毒性水平和对培养物去污染的推荐步骤：

1.对细胞进行分离，计数, 使用不含抗生素的培养基稀释将细胞稀释至常规传代的浓度。
2.将细胞悬液分入多孔培养板或几个小培养瓶中。向每一培养孔中添加不同浓度的特定抗生素。举例来说，我们推荐以如下浓度测试Gibco Fungizone试剂:0.25，0.50，1.0，2.0，4.0和8.0 µg/mL。
3.每日观察细胞脱落，出现空泡，融汇度降低，细胞变圆一类的毒性效应。
4.一旦确定了抗生素的毒性浓度水平，就可使用比毒性浓度低一至两倍的抗生素浓度来培养细胞两至三代。
5.在不含抗生素的培养基中培养一代。
6.重复步骤4。
7.在不含抗生素的培养基中培养细胞四至六代，以确定污染是否成功被消除。

请访问如下页面(https://www.thermofisher.com/us/en/home/life-science/cell-culture/mammalian-cell-culture/antibiotics.html)浏览我们提供的细胞培养相关的抗生素产品。

The Penicillin-Streptomycin-Glutamine solution is at 100X. This can be used at a 1X concentration in media.

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Yes, this is still good to use. The precipitate is due to the glutamine. The solution needs to be warmed to room temp and swirled unitl the glutamine goes back into solution.

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Yes, this is normal and will not affect the potency or application of the product. This solution is typically colorless. However, it can have a pink to yellow color tint. The coloring is a carry-over from the manufacturing process of Streptomycin - the genus that Steptomycin is isolated from (Actinomycetes Streptomyces griseus) is responsible for a wide variety of pigments.

Find additional tips, troubleshooting help, and resources within our Cell Culture Support Center.