| 查看: 398 | 回复: 1 | ||
[求助]
Origami™ B(DE3) 菌株 是否有lacZ活性？
|
|
如题； 我买的Origami™ B(DE3) Competent Cells，介绍里面说是一株BL21的LacZY基因缺失菌株。小弟想知道，该菌株的lacZ活性还存在不？ 附Origami™ B(DE3) Competent Cells的介绍和基因型： Origami™ B host strains carry the same mutations in trxB and gor as the original Origami strains, except that they are derived from a lacZY mutant of BL21 to enable precise control of expression levels by adjusting the concentration of IPTG. Thus the Origami B strains combine the desirable characteristics of BL21, Tuner™, and Origami strains in one strain background. The mutations in trxB and gor are selectable on kanamycin and tetracycline, respectively; therefore, these strains cannot be used with plasmids that can only selected with kanamycin or tetracycline. These strains also include the lon and ompT deficiences of BL21, which increase protein stability. 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. Genotype: F S (r m ) -ompT hsdB B-B-galdcm lacY1 ahpC (DE3) gor522:: Tn10 trxB (Kan , Tet ) |
回复此楼» 猜你喜欢
生物质炭与活化剂氢氧化钾混合注意事项
已经有0人回复
-
科研人必读：新一代 KRAS G12C 抑制剂 Olomorasib 的研究进展
已经有0人回复
-
化学工程及工业化学论文润色/翻译怎么收费?
已经有140人回复
-
BT-11（Omilancor）研究化合物全解析：从分子结构到实验应用要点
已经有0人回复
-
富马酸贝达喹啉：二芳基喹啉类工具化合物的化学特征
已经有0人回复
-
BT投稿with editor状态快两周了，正常吗
已经有25人回复
-
Silevertinib（BDTX-1535）结构拆解：炔基双环片段为何成为合成瓶颈
已经有0人回复
-
RO4929097 解析：双苯并氮杂䓬骨架与 Notch 通路实验设计要点
已经有0人回复
-
分子量 1157 的 PROTAC 怎么配不析出：SGK3-PROTAC1 的溶解、分装与图谱复核
已经有0人回复
-
logP 6.1 的羧酸怎么配母液：GSK 650394 的溶解窗口与稀释顺序
已经有0人回复
-
从"水不溶"到 71 mg/mL：雷特格韦的 pH 依赖溶解与螯合色谱边界
已经有0人回复
2楼2013-01-17 16:21:20
