我们所展示的质粒图谱主要是从文献和开放数据库中收集而来,主要是为了方便研究工作,其中一小部分质粒进行了质量控制,可供科学家使用。
所有的产品都严格仅供科学研究使用,不能应用于临床试验,包括人体摄入、注射或外用的药理学用途。
确保质粒的关键元件正确,但是我们并不能保证实验结果。页面展示的图谱序列为理论序列,可能与测序结果不一致,请自行比对后确定是否满足要求。(如果测过序,本页面一般会提供下载)
开放数据库中的大多数载体序列都没有被完全测序。如果实际序列与参考序列的相似度超过99%,则将其视为正确。
由于科学研究是在探索未知,具有很大的不确定性,在任何情况下,我们都不承担超出质粒本身的额外经济损失或责任。
The pEE12.4 plasmid is a mammalian - expression vector with multiple functions. Firstly, it contains strong promoters like the CMV enhancer and promoter, enabling efficient and stable transcription of target genes inserted into its multiple - cloning sites in mammalian cells, thus facilitating protein production. Secondly, it is commonly used for antibody expression. By inserting genes encoding antibody heavy or light chains, stable antibody - expressing cell lines can be established. Thirdly, the glutamine synthetase (GS) selection marker on pEE12.4 allows for the selection of transfected cells. Under specific culture conditions with appropriate selection pressure, only cells that have successfully taken up the plasmid and express GS can survive and proliferate, helping to isolate and enrich cells of interest.
- 载体名称:
- pEE12.4
- 载体抗性:
- Ampicillin
- 载体长度:
- 7569 bp
- 载体类型:
- Mammalian Expression Vectors
- 复制子:
- ori
- 载体来源:
- Lonza biologics
- 筛选标记:
- GS(Glutamine Synthetase)
- 拷贝数:
- High copy number
- 启动子:
- SV40
- 克隆方法:
- Enzyme Cut
- 5'引物:
- CMV fwd
- 感受态:
- DH10B
- 表达方法:
- Constiutive, Stable
pEE12.4 载体图谱
质粒操作方法
1. 发货形式:质粒干粉(常温运输,存于-20度,请务必先转化提质粒后使用)
2. 收到质粒干粉后请先5000rpm离心1min,再加入20μl ddH2O溶解质粒;(质粒复测的浓度有时候与标称值差距较大,这可能是因为冻干质粒在管中的位置、复溶效率、测量偏差以及管壁的吸附导致,因此建议先转化提质粒后再使用)
3. 取1支100μl 感受态于冰上解冻10min,加入2μl质粒,再冰浴30min后,42℃热激60s,不要搅动,再冰浴2min;
4. 加入900μl无抗的LB液体培养基,180rpm震荡37℃培养45min (30℃培养1-1.5小时);
5. 6000rpm离心5min,仅留100μl上清液重悬细菌沉淀,并涂布至目标质粒抗性的LB平板上;
6. 将平板倒置37℃培养14h,如果要求是30℃则培养20h; (菌落过多则将质粒稀释后再转化;没有菌落则加入10μl质粒转化;建议不要直接转表达感受态, 要先转克隆感受态,重提质粒后再导入表达感受态);
7. 挑取单菌落至LB液体培养基中,加入对应抗生素,220rpm震荡培养14h,根据实验需要和质粒提取试剂盒说明书提取质粒。
pEE12.4 载体序列
LOCUS V012681 7569 bp DNA circular SYN 23-SEP-2020 DEFINITION Exported. ACCESSION V012681 VERSION V012681 KEYWORDS pEE12.4 SOURCE synthetic DNA construct ORGANISM synthetic DNA construct . REFERENCE 1 (bases 1 to 7569) TITLE Direct Submission REFERENCE 2 (bases 1 to 7569) AUTHORS . TITLE Direct Submission COMMENT SGRef: number: 1; type: "Journal Article" FEATURES Location/Qualifiers source 1..7569 /mol_type="other DNA" /organism="synthetic DNA construct" polyA_signal 116..237 /label="SV40 poly(A) signal" /note="SV40 polyadenylation signal" rep_origin complement(999..1587) /direction=LEFT /label="ori" /note="high-copy-number ColE1/pMB1/pBR322/pUC origin of replication" CDS complement(1761..2618) /label="AmpR" /note="beta-lactamase" promoter complement(2619..2723) /label="AmpR promoter" terminator 2892..2919 /label="T7Te terminator" /note="phage T7 early transcription terminator" promoter 3002..3331 /label="SV40 promoter" /note="SV40 enhancer and early promoter" CDS 3370..4488 /gene="GLUL" /label="Glutamine synthetase" /note="Glutamine synthetase from Acomys cahirinus. Accession#: Q9QY94" intron 4623..4688 /label="small t intron" /note="SV40 (simian virus 40) small t antigen intron" CDS 4818..4838 /label="SV40 NLS" /note="nuclear localization signal of SV40 (simian virus 40) large T antigen" polyA_signal 5263..5397 /label="SV40 poly(A) signal" /note="SV40 polyadenylation signal" enhancer 5966..6345 /label="CMV enhancer" /note="human cytomegalovirus immediate early enhancer" promoter 6346..6549 /label="CMV promoter" /note="human cytomegalovirus (CMV) immediate early promoter" intron 6685..7511 /label="CMV intron A" /note="human cytomegalovirus intron A (Chapman et al., 1991)"