产品名称
Blue-White Select™ 筛选试剂, for selection of recombinant bacterial clones
grade
Molecular Biology
form
liquid
usage
sufficient for 125 dishes (90 mm)
technique(s)
nucleic acid detection: suitable
suitability
suitable for nucleic acid staining
shipped in
dry ice
storage temp.
−20°C
Quality Level
Biochem/physiol Actions
当 Blue-White Select ™ 筛查试剂被 β-半乳糖苷酶裂解时,所得产物会形成蓝色沉淀。存在 Lac + 菌落的情况下生长 Select ™ 筛选试剂保持白色,便于区分 lac + 和 lac-菌落。
该技术是基于载体的,如携带编码β-半乳糖苷酶 α-片段的 β-半乳糖苷酶基因的 pUC 和 M13mp 系列。开发这些载体需要使用携带互补基因片段的细菌菌株,以允许组装活性复合物,从而形成蓝色菌落。将 DNA 片段插入载体导致 ß-半乳糖苷酶基因断裂 ′多克隆位点导致功能 β-半乳糖苷酶活性;这些菌落保持白色,便于区分 lac + 和 lac-菌落。
该技术是基于载体的,如携带编码β-半乳糖苷酶 α-片段的 β-半乳糖苷酶基因的 pUC 和 M13mp 系列。开发这些载体需要使用携带互补基因片段的细菌菌株,以允许组装活性复合物,从而形成蓝色菌落。将 DNA 片段插入载体导致 ß-半乳糖苷酶基因断裂 ′多克隆位点导致功能 β-半乳糖苷酶活性;这些菌落保持白色,便于区分 lac + 和 lac-菌落。
Features and Benefits
- 强烈的颜色对比,便于菌落选择
- 便捷的即用型解决方案
General description
Sigma 蓝白 Select ™ 筛选试剂是 β-半乳糖苷酶 的显色底物,用于确定琼脂平板上生长的细菌中是否存在克隆的 DNA 插入片段。蓝白选择™筛选试剂设计用于选择具有 lac + 表型的蓝白色重组细菌菌落。
Other Notes
40 mg/mL IPTG
40 mg/mL X-Gal
(在 DMSO 中制备)
40 mg/mL X-Gal
(在 DMSO 中制备)
Legal Information
Blue-White Select is a trademark of Sigma-Aldrich Co. LLC
存储类别
10 - Combustible liquids
wgk
WGK 3
flash_point_f
188.6 °F
flash_point_c
87 °C
ppe
Eyeshields, Gloves, type ABEK (EN14387) respirator filter
Methylation of single-stranded DNA in vitro introduces new restriction endonuclease cleavage sites.
B Gronenborn et al.
Nature, 272(5651), 375-377 (1978-03-23)
Ausubel, F.M., et al.
Current Protocols in Molecular Biology, 1-1 (1995)
Regulation of the Escherichia coli lac operon expressed in human cells.
Bioard, D.S. et al.
Biochimica et Biophysica Acta, 113, 68-74 (1992)
D S Biard et al.
Biochimica et biophysica acta, 1130(1), 68-74 (1992-02-28)
We have investigated the use of various Epstein-Barr virus (EBV)-based vectors bearing the two components of the Escherichia coli lac operator-repressor (lacO, lacI) complex. Our aim was to develop a model system of gene expression by looking at the transcription
Characterization by in vitro complementation of a peptide corresponding to an operator-proximal segment of the beta-galactosidase structural gene of Escherichia coli.
A Ullmann et al.
Journal of molecular biology, 24(2), 339-343 (1967-03-14)
实验方案
Blue/white color selection streamlines vector insert differentiation, enhancing cloning efficiency for molecular biologists.
我们的科学家团队拥有各种研究领域经验,包括生命科学、材料科学、化学合成、色谱、分析及许多其他领域.
联系客户支持