登录 查看组织和合同定价。
选择尺寸
关于此项目
化学文摘社编号:
UNSPSC Code:
12352204
NACRES:
NA.54
EC Number:
232-667-0
MDL number:
Specific activity:
≥2,000 units/mg protein
Biological source:
bovine pancreas
产品名称
脱氧核糖核酸酶 I 来源于牛胰腺, Type II-S, lyophilized powder, Protein ≥80 %, ≥2,000 units/mg protein
biological source
bovine pancreas
sterility
sterile-filtered
type
Type II-S
form
lyophilized powder
specific activity
≥2,000 units/mg protein
mol wt
~31 kDa
purified by
chromatography
composition
Protein, ≥80%
packaging
vial of ≥10.0 mg protein
technique(s)
DNA purification: suitable
impurities
endotoxin, tested
solubility
0.15 M NaCl: soluble 5.0 mg/mL, clear(lit.)
suitability
suitable for molecular biology
application(s)
diagnostic assay manufacturing
diagnostic assay manufacturing
foreign activity
Chymotrypsin ≤0.01%
Protease ≤0.005%
RNase ≤0.01%
storage temp.
−20°C
Quality Level
正在寻找类似产品? 访问 产品对比指南
Analysis Note
双缩脲法测定蛋白质。
Application
Sigma公司的DNAse I与人类尿液来源的白细胞介素1抑制剂相比,具有水解[14C]DNA [14C]的能力。它也被用来切割139个碱基对Hind III/Nci I限制性片段,以研究该酶用于足迹实验的稳定性。DNase I被广泛用作研究药物和蛋白质与DNA结合的印迹剂。
已有研究采用牛胰腺脱氧核糖核酸酶I,研究了从牛胰腺中提取高活性RNase、DNase、胆固醇酯酶和胰蛋白酶的一个新途径。牛胰腺脱氧核糖核酸酶I也被用于研究鲤鱼肝脏DNase的分离和进一步的特性。
用于从蛋白质样品中除去 DNA。
Biochem/physiol Actions
DNase I是一种核酸内切酶,作用于嘧啶附近的磷酸二酯键,产生末端为5-磷酸的多核苷酸。在Mg2+存在时,DNAse I对每条DNA链进行独立的裂解,裂解位点是随机的。在Mn2+存在下,两条DNA链几乎在同一位点被裂解。其最佳pH值在7到8之间。二价阳离子,如Mn2+、Ca2+、Co2+和Zn2+是该酶的激活剂。浓度为5mM的Ca2+ 可以稳定酶的蛋白水解消化。牛胰腺DNA酶I由A、B、C、D四种色谱可分辨组分组成,摩尔比分别为4:1:1。仅发现少量的D。2-巯基乙醇、螯合剂、十二烷基硫酸钠(SDS) 和肌动蛋白 是已知的抑制该酶活性的物质。
Other Notes
以I型或III型DNA作为底物时,在pH 5.0、37°C条件下,一单位Kunitz 每分钟可生成0.001/mL的ΔA260。(1单位 = 1 Kunitz单位)
Physical form
含氯化钙的冻干粉
Preparation Note
该酶粉可在pH值为4.0-9.0的水中或任何缓冲液中进行复溶,磷酸盐缓冲液除外。应避免钙螯合剂的存在。在0.15 M NaCl中加入10 mg/mL DNAse I溶液,在 −20°C的温度下保存一周,其活性可能会降低10%。同样的溶液分装储存在2-8°C中,其活性可降低约20%。它在60°C下,pH值5到7之间可保持活性长达5小时,在68°C时在<10分钟内失去活性。在醋酸盐缓冲液(pH 5.0)和tris缓冲液(pH 7.2)中,当浓度为1mg/mL时,其活性以6%/小时的速度丧失。
signalword
Danger
hcodes
pcodes
Hazard Classifications
Resp. Sens. 1
存储类别
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
法规信息
动植物源性产品
低风险生物材料
此项目有
Stability of DNase I in footprinting experiments.
B Ward et al.
Nucleic acids research, 16(17), 8724-8724 (1988-09-12)
Enzymes of Molecular Biology
Weir, A. F.
Methods in Molecular Biology, 16 (1993)
D L Rosenstreich et al.
The Journal of experimental medicine, 168(5), 1767-1779 (1988-11-01)
We have previously reported that the urine of febrile humans contained large quantities of an inhibitor of IL-1-induced murine thymocyte proliferation that was a glycoprotein between 30 and 40 kD in size. In the present study this factor has been
E Lazarides et al.
Proceedings of the National Academy of Sciences of the United States of America, 71(12), 4742-4746 (1974-12-01)
Various tissues and cells in culture contain a specific inhibitor of DNase I (EC 3.1.4.5). In this paper evidence is presented that this inhibitor is actin, one of the major structural proteins of muscle and nonmuscle cells. (a) The inhibitor
T Liao
The Journal of biological chemistry, 250(10), 3831-3836 (1975-05-25)
In the course of experiments on the role of the COOH-terminal residues in pancreatic deoxyribonuclease, we undertook to ascertain whether the presence of sodium dodecyl sulfate would render the normally unavailable terminus susceptible to hydrolysis by carboxypeptidase A. When DNase
实验方案
To standardize a procedure for the enzymatic assay of Deoxyribonuclease I.
建立脱氧核糖核酸酶I酶促测定的标准化操作流程。
相关内容
QC Methods
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