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- 产品型号： millipore
- 简单描述
- VSWP04700MERCK MILLIPORE 0.025um孔径过滤膜VSWP04700MF-Millipore表面滤膜，混合纤维素酯，亲水，0.025 um，47 mm，白色，光面应用 ： 应用 DNA 和蛋白质微量透析
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生物信息
媒质 MF-Millipore
可湿润性 亲水
理化信息
重量分析的提取物（%） 1.5
孔隙率% 72
水流量（L/min x cm?） 0.15
真空极限 Filter membranes
折射系数 1.5
孔径（µm） 0.025
空气流量（L/min x cm?） 0.15
23°C时的泡点 ≥21.1
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sigma现货代理Dispase II D-4693
sigma现货代理Dispase II D-4693
- 产品型号：
- 简单描述
- sigma现货代理Dispase II D-4693Related CategoriesApplication Index, Biochemicals and Reagents, Cell Biology, Dissociation, Enzymes, Inhibitors, and Substrates,More…activity ≥0.5 units/mg solidsol
详细介绍
sigma现货代理Dispase II D-4693
Description
Analysis Note
The enzyme can be initially dissolved in 50 mM Hepes/KOH pH 7.4, 150 mM NaCl at 10 mg/ml. Further dilutions should be made in the cell culture media most appropriate for the cells being dissociated. Dispase is a metalloproteinase and is activated by divalent cations including Ca2+ , Mg2+, Mn2+ and Fe2+.
Preparation Note
A 50 U/mL stock solution may be prepared by dissolving the powder in a buffer containing 10 mM NaAc (pH 7.5) and 5 mM CaAc. It should be stored at 4 °C.
Unit Definition
One unit will hydrolyze casein to produce color equivalent to 1.0 μmole (181 μg) of tyrosine per min at pH 7.5 at 37 °C (color by Folin-Ciocalteu reagent), unless otherwise indicated.
Physical form
lyophilized powder containing calcium acetate and milk sugar
Application
The enzyme from Sigma has been used in developing a protocol for ex vivoculture of mouse embryonic mammary buds.[5] It has been used in the treatment of rat heart pieces during the isolation of mitochondria from rat heart.[6] It has also been used for the isolation of dental pulp stem cells (DPSCs) by enzymatic hydrolysis. These cells have been compared with DPSCs isolated by explant method to analyse their stem cell and differentiation properties.[1]
Dispase II has been used for Fluorescence-Activated Cell Sorting (FACS).[3] It has also been used for separating visceral yolk sac layers.[2]
Biochem/physiol Actions
Dispase II is a neutral protease that hydrolyzes the N-terminal peptide bonds of non-polar amino acid residues. It may be used for separating many tissues and cells grown in vitro. The enzyme is very gentle and does not damage cell membranes. It can also be used to prevent clumping in suspension cultures. This protease cleaves fibronectin and type IV collagen, but not laminin, type V collagen, serum albumin, or transferrin.[4] Dispase II is specific for the cleavage of Leucine-Phenylalanine bonds. Ca2+, Mg2+, Mn2+, Fe2+, Fe3+ and Al3+activate the enzyme. EDTA, EGTA, Hg2+ and other heavy metals inhibit the enzyme activity.[7] The enzyme contains 1g-atom of zinc per g-mol of purified enzyme. If this zinc component is removed by chelating agents such as EDTA or EGTA, an inactive apoenzyme is obtained. The enzyme is not inhibited by serum.
sigma现货代理Dispase II D-4693
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