Bln I (Avr II)

产品说明

一般描述

Bln I recognizes the sequence C↓CTAGG and generates fragments with 5′-cohesive termini.

Compatible ends
Bln I ends are compatible with ends generated by Nhe I, Spe I and Xba I.

Isoschizomers
Bln I is an isoschizomer of Avr II.
Note: The complete 13 site Avr II restriction map of the E.coli genome has been reported.

Methylation sensitivity
The enzyme is not known to be affected by methylation.

特异性

Recognition sites: CCTAGG
CCTAGG
Restriction site: C↓CTAGG
C↓CTAGG
Heat inactivation: No inactivation of Bln I after incubation at 65 ℃ for 15 minutes.

质量

Absence of nonspecific endonuclease activities
1 μg λDNA is incubated for 16 hours in 50 μl SuRE/Cut Buffer H with an excess of Bln I. The number of enzyme units which do not change the enzyme-specific pattern is stated in the certificate of analysis.

Absence of exonuclease activity
Approximately 5 μg [³H] labeled calf thymus DNA are incubated with 3 μl Bln I for 4 hours at +37℃ in a total volume of 100 μl 50 mM Tris-HCl, 10 mM MgCl₂, 1 mM Dithioerythritol, pH approximately 7.5. Under these conditions, no release of radioactivity is detectable, as stated in the certificate of analysis.

Typical ligation and recutting assay
Bln I fragments obtained by complete digestion of 1 μg λ × EcoR I DNA ligated for 16 hours at +4℃ with 1 U T4 DNA Ligase in 10 μl buffer that contains 66 mM Tris-HCl, 5 mM MgCl₂, 5 mM Dithiothreitol, 1 mM ATP, pH 7.5 (at +20℃). The percentages of product that can be ligated and subsequently recut with Bln I and EcoR I (yielding the typical pattern of λ × EcoR I × Bln I fragments) are stated under "Lig" and "Rec" in the certificate of analysis.

DNA图谱分析

Number of cleavage sites on different DNAs

• λ: 2
• φX174: 0
• Ad2: 2
• M13mp7: 0
• M13mp18:0
• pBR322: 0
• pBR328: 0
• pUC18: 0
• SV40: 2

单位定义

One unit is the enzyme activity that completely cleaves 1 μg λ x EcoR I DNA fragments in one hour at +37 ℃ in a total volume of 25 μl (1x) SuRE/Cut Buffer H.

分析说明

SuRE/Cut Buffer System
The buffer in bold is recommended for optimal activity

• A: 25-50%
• B: 50-75%
• H: 100%
• L: 0-10%
• M: 25-50%

Activity in PCR buffer: Not tested
PFGE tested
Bln I has been tested in Pulsed-Field Gel Electrophoresis (on bacterial chromosomes). For cleavage of genomic DNA (E.coli C 600) embedded in agarose for PFGE analysis, we recommend using 10 U of enzyme/μg DNA and 4 hour incubation.

其他说明

仅用于生命科学研究。不可用于诊断。

产品性质

质量水平	100
生物来源	bacterial (Brevibacterium linens)
形式	solution
包装	pkg of 1,000 U (11558170001 [10 U/μl]) pkg of 200 U (11558161001 [10 U/μl])
manufacturer/tradename	Roche
参数	37 ℃ optimum reaction temp.
运输	dry ice
储存温度	−20℃

组份列表

组份不可单独销售

货号	组份
	Enzyme Solution
	SuRE/Cut Buffer H 10x concentrated

安全信息

储存分类代码	12 - Non Combustible Liquids
WGK	WGK 1
闪点(F)	does not flash
闪点(C)	does not flash