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34820-01-4

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34820-01-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 34820-01-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,4,8,2 and 0 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 34820-01:
(7*3)+(6*4)+(5*8)+(4*2)+(3*0)+(2*0)+(1*1)=94
94 % 10 = 4
So 34820-01-4 is a valid CAS Registry Number.

34820-01-4Downstream Products

34820-01-4Relevant articles and documents

Quantifying the electronic effects of carbohydrate hydroxy groups by using aminosugar models

Pedersen, Christian M.,Olsen, Jacob,Brka, Azra B.,Bols, Mikael

scheme or table, p. 7080 - 7086 (2011/07/08)

Methyl amino-deoxy-glycosides with α- and β-gluco, α-galacto, or α-manno stereochemistry with the amino functionality in each of the four possible non-anomeric positions have been synthesized and their pKa values determined by titration. These

Elucidation of the mechanism of polysaccharide cleavage by chondroitin AC lyase from Flavobacterium heparinum

Rye, Carl S.,Withers, Stephen G.

, p. 9756 - 9767 (2007/10/03)

Chondroitin AC lyase from Flavobacterium heparinum degrades chondroitin sulfate glycosaminoglycans via an elimination mechanism resulting in disaccharides or oligosaccharides with Δ4,5-unsaturated uronic acid residues at their nonreducing end. Mechanistic details concerning the ordering of the bond-breaking and -forming steps of this enzymatic reaction are nonexistent, mainly due to the inhomogeneous nature of the polymeric substrates. The creation of a new class of synthetic substrates for this enzyme has allowed the measurement of defined and reproducible kcat and Km values and has expanded the range of mechanistic studies that can be performed. The primary deuterium kinetic isotope effect upon kcat/Km for the abstraction of the proton α to the carboxylic acid was measured to be 1.67 ± 0.07, showing that deprotonation occurs in a rate-limiting step. Using substrates with leaving groups of differing reactivity, a flat linear free energy relationship was produced, indicating that the C4-O4 bond is not broken in a rate-determining step. Taken together, these results strongly suggest a stepwise mechanism. Consistent with this was the measurement of a secondary deuterium kinetic isotope effect upon kcat/Km of 1.01 ± 0.03 on a 4-{2H}-substrate, indicating that no sp2 character is developed at C4 during the rate-limiting step, thereby ruling out a concerted syn-elimination.

A general enzymatic method for the synthesis of natural and 'unnatural' UDP- and TDP-nucleotide sugars [20]

Jiang, Jiqing,Biggins, John B.,Thorson, Jon S.

, p. 6803 - 6804 (2007/10/03)

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