Buy N-Acetyl-D-tryptophan

The binding of three competitive inhibitors, N-acetyl-D-tryptophan has been studied, N-acetyl-L-tryptophan and amide N-acetyl-D-tryptophan, chymotrypsin on the pH range of 2 · 20-9 · 65 by the dialysis technique at equilibrium. 2. Within the limits of the experimental method, the binding of uncharged amide inhibitor is independent of pH in the range studied. 3. The connection of each enantiomer acids depends on the ionization of a group on the free enzyme, apparent pKa7 · 3. 4. It is shown that the results of the ionization group in the active site of the enzyme a net negative charge at pH above 7 · Development 3. 5. enzymes responsible groups are tentatively identified, and the importance of binding constants in terms of enzymatic catalysis is discussed.

Deuterated chloroform for sale

Product Name: deuterated chloroform
CAS: 865-49-6
Molecular formula: CCl3D
Formula Weight: 120.38
Description:
Deuterochloroform (CDCl3), a isotopologue chloroform (CHCl 3) in which the hydrogen ("H") with a deuterium (heavy hydrogen) is an isotope is replaced ("D"). Deuterated chloroform is the solvent most commonly used in NMR spectroscopy.

Deuterium oxide for sale

Product Name: deuterium oxide
CAS: 7789-20-0
Molecular formula: D 2 O
Molecular Weight: 8:03 p.m.
Description: deuterium oxide is water containing a higher than normal proportion of deuterium isotope of hydrogen.
The deuterium oxide is often used as a source of deuterium for preparing isotopologues specifically labeled organic compounds.

4-nitro-2-(trifluoromethyl)benzoic acid

Product Name: 2-nitro-4 (trifluoromethyl) benzoic acid
CAS: 320-94-5
Molecular formula: C8H4F3NO4
Formula Weight: 235.12
Description:
Density: 1.596 g / cm3
Melting point 134-138 ° C
Boiling point: 306.6 ° C at 760 mmHg
Flash Point: 139.2 ° C
Appearance: Yellowish crystals.
Application: Used as a pharmaceutical intermediate.
Storage: Stored in normal temperature.

Acenocoumarol for sale

Product Name: acenocoumarol
CAS: 152-72-7
Molecular formula: C19H15NO6
Molecular Weight: 353.33
Description:
Acenocoumarol is an anticoagulant, vitamin K antagonist (such as warfarin). It is a derivative of coumarin and is marketed under the brand name Sintrom and Sinthrome.

Glass beads plating iron and nickel

Product Name: Coating Glass Beads iron and nickel
Product description: glass beads is low density, high surface area, good thermal stability and chemical stability, high mechanical strength, good fluidity and other advantages, the main chemical composition is SiO2 and Al2O3. glass beads, although he himself does not have absorbent properties, but it is a good basic material for the production of glass beads absorbed .Have materials as the core, by electroplating on the surface of a layer good performance of the soft magnetic iron-nickel alloy or iron nanoparticles can not effectively reduce the density of the absorbent, but can also get good absorbent properties.

Diamond synthesis material - nickel coated graphite powder

Product Name: diamond synthetic material - nickel coated graphite powder

Product Description: Nickel coated graphite iron powder instead of accelerator mixture with the graphite powder and can be used in the synthesis of the diamond, effectively overcome the drawbacks that the catalyst uniformly mixing hard metal powder and powder graphite, and easily secrete after mixed. With the nickel-plated iron powder to remove the synthetic graphite piece product the metal continuity of graphite contact surface, easy to communicate when combing carbon atoms form at nucleation of the continuous metal film diamond, and contribute to the transformation diamond to improve the combination of synthetic diamond of high quality.