■ 產(chǎn)品介紹
Origami 2 host strains are K-12 derivatives that have mutations in both the thioredoxin reductase (trxB) and glutathione reductase (gor) genes, which greatly enhance disulfide bond formation in the E. coli cytoplasm. The Origami 2 strains are kanamycin sensitive; like the original Origami strains, the gor mutation is still selected for by tetracycline. To reduce the possibility of disulfide bond formation between molecules, strains containing mutations in trxB and gor are recommended only for the expression of proteins that require disulfide bond formation for proper folding. DE3 indicates that the host is a lysogen of λDE3, and therefore carries a chromosomal copy of the T7 RNA polymerase gene under control of the lacUV5 promoter. Such strains are suitable for production of protein from target genes cloned in pET vectors by induction with IPTG. pLysS strains express T7 lysozyme, which further suppresses basal expression of T7 RNA polymerase prior to induction, thus stabilizing pET recombinants encoding target proteins that affect cell growth and viability. |
基因型： | Δ(ara-leu)7697 ΔlacX74 ΔphoA PvuII phoR araD139 ahpC galE galK rpsL F′[lac+ lacIq pro] (DE3) gor522::Tn10 trxB pLysS (CamR, StrR, TetR) |
■ 基本信息
抗性: | Str/Chl/tet |
培養(yǎng)基: | LB |
菌株類別: | 大腸桿菌 |
培養(yǎng)條件: | 37℃，有氧，LB |
質(zhì)粒轉(zhuǎn)化: | 42℃熱激 |
保存方式: | 20%甘油，-20℃ |
基本應(yīng)用: | 用于蛋白表達 |
■ 使用方法
建議超凈臺內(nèi)劃線涂板，得到單克隆后再進行其他實驗操作，避免雜菌污染。
■ 注意事項
1. 本產(chǎn)品僅可用于實驗室研究，不能用于動物，人體以及作為食品添加劑等用途。
2. 為了您的安全和健康，請穿實驗服并戴一次性手套操作。
3. 使用甘油菌時可不完全融解，在甘油菌表面蘸取少量涂布固體瓊脂平板即可，也可完全融解后使用，但隨著凍融次數(shù)的增加，菌株的活力會逐漸下降。
