
Ordering
Item | Catalog # | Description | Quantity | Price (USD) | ||
---|---|---|---|---|---|---|
Plasmid | 104496 | Standard format: Plasmid sent in bacteria as agar stab | 1 | $75 | Add to Cart | |
AAV1 | 104496-AAV1 | 100 µL at titer ≥ 7×10¹² vg/mLand Plasmid.More Information | Add to Cart | |||
AAV Retrograde | 104496-AAVrg | Virus (100 µL at titer ≥ 7×10¹² vg/mL)and Plasmid.More Information | Add to Cart |
This material is available to academics and nonprofits only.
Backbone
- Vector backboneAAV-CAG-FLEX(Search Vector Database)
- Backbone manufacturerScott Sternson
- Backbone sizew/o insert(bp)5027
- Total vector size (bp)6380
- Vector typeMammalian Expression, AAV, Cre/Lox
Growth in Bacteria
- Bacterial Resistance(s)Ampicillin
- Growth Temperature30°C
- Growth Strain(s)NEB Stable
- Copy numberLow Copy
Gene/Insert
- Gene/Insert namejGCaMP7f
- Alt nameGCaMP3-T302L R303P A317L D380Y
- Alt nameGCaMP3 variant 921
- Alt nameJanelia GCaMP7
- SpeciesR. norvegicus (rat), G. gallus (chicken); A. victoria (jellyfish)
- Insert Size (bp)1353
- PromoterCAG
- Tag/ Fusion Protein
- T7 epitope, Xpress tag, 6xHis
Cloning Information
- Cloning methodRestriction Enzyme
- 5′ cloning siteBsmBI(destroyed during cloning)
- 3′ cloning siteBsmBI(destroyed during cloning)
- 5′ sequencing primerGGTTCGGCTTCTGGCGTGTGACC (Common Sequencing Primers)
Resource Information
- Terms and Licenses
- UBMTA
- Ancillary Agreement for Plasmids Containing FP Materials
- genOway Notice of RIghts
- Industry Terms
- Not Available to Industry
Information for AAV1 (Catalog # 104496-AAV1)(Back to top)
Purpose
Ready-to-use AAV1 particles produced from pGP-AAV-CAG-FLEX-jGCaMP7f-WPRE (#104496). In addition to the viral particles, you will also receive purified pGP-AAV-CAG-FLEX-jGCaMP7f-WPRE plasmid DNA.
CAG-driven, Cre-dependent jGCaMP7f calcium sensor. These AAV preparations are suitable purity for injection into animals.Delivery
- Volume100 µL
- Titer≥ 7×10¹² vg/mL
- Pricing$350 USD for preparation of 100 µL virus + $30 USD for plasmid.
- StorageStore at -80℃. Thaw just before use and keep on ice.
- ShipmentViral particles are shipped frozen on dry ice. Plasmid DNA (≥ 200ng) will also be included in the shipment.
Viral Production & Use
- Packaging Plasmidsencode adenoviral helper sequences and AAV rep gene, AAV1 cap gene
- BufferPBS + 0.001% Pluronic F-68 + 200 mM NaCl
- SerotypeAAV1
- PurificationIodixanol gradient ultracentrifugation
Biosafety
Requestor is responsible for compliance withtheir institution"s biosafety regulations.Lentivirus is generally considered BSL-2. AAV isgenerally considered BSL-1, but may requireBSL-2 handling depending on the insert.Biosafety Guide
Resource Information
- Terms and Licenses
- Ancillary Agreement for Penn Vectors
- Terms of Use for Viral Vectors
- Industry Terms
- Not Available to Industry
Viral Quality Control
- Addgene ensures high quality viral vectors by optimizing and standardizing production protocols and performing rigorous quality control (QC) (see a list of our QC assays). Thespecific QC assays performed varies for each viral lot. To learn which specific QC assays were performed on your lot, please contact us.
- Titer: the exact titer of your sample will be reported on the tube. The titer you see listed on this page is the guaranteed minimum titer. See how titers are measured.
Visit our viral production page for moreinformation.
Addgene Comments
Using FLEX vectors in vivo: LoxP sites in FLEX plasmids are known to recombine during DNA amplification and viral vector production, which may result in a minority of Cre-activated (i.e., "flipped") viral vectors. Addgene has measured this occurs in 0.01-0.03% of viral vectors in our typical production protocol. This can lead to a small number of cells exhibiting Cre-independent transgene expression in vivo. To address this, we recommend titrating to find the optimal AAV dosage required for Cre-dependent transgene expression and function in vivo. This may include reducing the viral vector dosage in order to reduce the likelihood of Cre-independent expression.
Information for AAV Retrograde (Catalog # 104496-AAVrg)(Back to top)
Purpose
Ready-to-use AAV Retrograde particles produced from pGP-AAV-CAG-FLEX-jGCaMP7f-WPRE (#104496). In addition to the viral particles, you will also receive purified pGP-AAV-CAG-FLEX-jGCaMP7f-WPRE plasmid DNA.
CAG-driven, Cre-dependent jGCaMP7f calcium sensor. These AAV were produced with a retrograde serotype, which permits retrograde access to projection neurons. These AAV preparations are suitable purity for injection into animals.Delivery
- Volume100 µL
- Titer≥ 7×10¹² vg/mL
- Pricing$350 USD for preparation of 100 µL virus + $30 USD for plasmid.
- StorageStore at -80℃. Thaw just before use and keep on ice.
- ShipmentViral particles are shipped frozen on dry ice. Plasmid DNA (≥ 200ng) will also be included in the shipment.
Viral Production & Use
- Packaging Plasmidsencode adenoviral helper sequences and AAV rep gene, AAV retrograde cap gene from rAAV2-retro helper (plasmid #81070)
- BufferPBS + 0.001% Pluronic F-68 + 200 mM NaCl
- SerotypeAAV retrograde (AAVrg)
Biosafety
Requestor is responsible for compliance withtheir institution"s biosafety regulations.Lentivirus is generally considered BSL-2. AAV isgenerally considered BSL-1, but may requireBSL-2 handling depending on the insert.Biosafety Guide
Resource Information
- Terms and Licenses
- Terms of Use for Viral Vectors
- Industry Terms
- Not Available to Industry
Viral Quality Control
- Addgene ensures high quality viral vectors by optimizing and standardizing production protocols and performing rigorous quality control (QC) (see a list of our QC assays). Thespecific QC assays performed varies for each viral lot. To learn which specific QC assays were performed on your lot, please contact us.
- Titer: the exact titer of your sample will be reported on the tube. The titer you see listed on this page is the guaranteed minimum titer. See how titers are measured.
Visit our viral production page for moreinformation.
Addgene Comments
Retrograde functionality is dependent on high viral titers. Addgene recommends not diluting your AAV preps prior to use.Using FLEX vectors in vivo: LoxP sites in FLEX plasmids are known to recombine during DNA amplification and viral vector production, which may result in a minority of Cre-activated (i.e., "flipped") viral vectors. Addgene has measured this occurs in 0.01-0.03% of viral vectors in our typical production protocol. This can lead to a small number of cells exhibiting Cre-independent transgene expression in vivo. To address this, we recommend titrating to find the optimal AAV dosage required for Cre-dependent transgene expression and function in vivo. This may include reducing the viral vector dosage in order to reduce the likelihood of Cre-independent expression.
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目标蛋白对细胞有毒性,导致细胞死亡;
转染试剂以及DNA用量信息需要优化,否则对细胞具有伤害;
细胞贴壁转染之后没有正常换液。
建议:考虑对目标蛋白进行截短构建、尝试其他细胞系统;摸索转染试剂以及DNA用量信息,如果转染试剂毒性太大,可以考虑尝试义翘转染试剂sinofection;对转染后的细胞进行换液处理,如果细胞状态感觉不够理想,可以考虑添加一些血清来帮助细胞恢复健康。
以上所有分析、建议的前提是,细胞培养、无菌操作等等都没有问题。祝顺利,加油~
不建议你用MDCK细胞,非常难转染。
GFP发出绿色荧光的原理是Ca离子进入GFP的beta-barrel结构中引起的特定能级,因此只要这个结构仍然保持着,就可以发出荧光。
由于GFP的beta-barrel结构非常稳定,一些版本的GFP蛋白(如EGFP)甚至能抵抗94C的高温几分钟而不完全变性,因此想在溶液状态下去掉GFP的荧光是很难的,一般需要用光漂白法。
基于其非常稳定的结构,即便细胞被固定了,仍然会有一部分的GFP蛋白保持其构象而发出荧光。此时荧光可能较弱。在荧光显微镜下是有可能看得到的。
DXY721认为:
悬浮细胞和贴壁细胞在转染过程中差别不大,主要差别在于转染后的筛选,当然如果你做的是瞬时转染就不存在筛选的问题了。
其实转染的过程很简单,问题是能不能转的进去的,转染率能有多少,转进去是否可以稳定表达目的蛋白等等。
我们也是用脂质体做悬浮细胞的转染,说明书上都有具体的操作过程,将脂质体和目的基因按比例混合,然后加到细胞悬液里就OK了,说的简单,实际上还是有一些细节要注意的,比如脂质体和目的基因混合的比例,转染的细胞数,细胞的代数,细胞的状态,有的还要求在转染的前一天传代一次,不过不要怕,这些在脂质体说明书上都有明确的说明,按照说明书做就可以了。
jinghuanlv认为:
悬浮细胞和贴壁细胞转染还是有很大不同的。
脂质体转染的原理基于电荷吸引原理,先形成脂质体-DNA复合物,散布在细胞周围,然后通过细胞的内吞作用,将目的基因导入细胞内,而脂质体复合物与贴壁细胞的接触机会比悬浮细胞高出很多倍,所以,脂质体转染时悬浮细胞的转染效率要明显低于贴壁细胞。
我们实验室转染悬浮细胞是用的电穿孔法,目前为止,悬浮细胞转染的最好方法还是电转,我们实验室用的电转仪是Bio-Rad的,使用条件是电压250V,电容975uF,效果不错,不妨一用。
脂质体是磷脂分散在水中时形成的脂质双分子层,又称为人工生物膜。
阳离子脂质体表面带正电荷,能与核酸的磷酸根通过静电作用将DNA分子包裹入内,形成DNA一脂复合体,也能被表面带负电荷的细胞膜吸附,再通过膜的融合或细胞的内吞作用,偶尔也通过直接渗透作用,DNA传递进入细胞,形成包涵体或进入溶酶体 其中一小部分DNA能从包涵体内释放,并进入细胞质中,再进一步进入核内转录、表达。
转染分2种,一种是瞬时转染,即转染后让细胞表达目的蛋白后即提取蛋白,提一次蛋白,转染一次,这种方式一般不传代;
另一种转染为稳定转染,转染后加入一定选择压力进行筛选,没有转染的细胞不能存活,只留下转染的细胞,这种情况下可以筛选单个转染细胞,构建稳定表达某一特定蛋白或基因的细胞系。

