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181117-83-9

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181117-83-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 181117-83-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,1,1,1 and 7 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 181117-83:
(8*1)+(7*8)+(6*1)+(5*1)+(4*1)+(3*7)+(2*8)+(1*3)=119
119 % 10 = 9
So 181117-83-9 is a valid CAS Registry Number.

181117-83-9Downstream Products

181117-83-9Relevant articles and documents

Enzymatic peptide synthesis with p-guanidinophenyl and p- (guanidinomethyl)phenyl esters as acyl donors

Sekizaki, Haruo,Itoh, Kunihiko,Toyota, Eiko,Tanizawa, Kazutaka

, p. 846 - 849 (2007/10/03)

Two series of 'inverse substrates', N-Boc-amino acid p-guanidinophenyl and p-(guanidinomethyl)phenyl esters, were prepared as acyl donor components for enzymatic peptide synthesis. The kinetic behavior of these esters toward bovine and Streptomyces griseus (SG) trypsin was analyzed. The spatial requirement of the active site of these enzymes for catalytic efficiency is discussed based on the steric characteristics of the substrates. These substrates were found to couple readily with amino acid p-nitroanilides to produce peptides. SG trypsin was the most efficient catalyst among the enzymes tested (bovine, porcine, and SG trypsin).

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