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33477-43-9

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33477-43-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33477-43-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,4,7 and 7 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 33477-43:
(7*3)+(6*3)+(5*4)+(4*7)+(3*7)+(2*4)+(1*3)=119
119 % 10 = 9
So 33477-43-9 is a valid CAS Registry Number.

33477-43-9Relevant articles and documents

Enzymatic C-terminal amidation of amino acids and peptides

Nuijens, Timo,Piva, Elena,Kruijtzer, John A.W.,Rijkers, Dirk T.S.,Liskamp, Rob M.J.,Quaedflieg, Peter J.L.M.

experimental part, p. 3777 - 3779 (2012/09/22)

Herein, we describe two versatile and high yielding enzymatic approaches for the conversion of semi-protected amino acid and peptidyl C-terminal α-carboxylic acids into their corresponding amides. In the first approach, the lipase Candida antarctica lipase-B (Cal-B), and in the second approach, the protease Subtilisin A, are used, respectively. We found that by using the ammonium salt of the α-carboxylic acid instead of separate ammonia sources, the enzymatic amidation reactions proceeded much faster without side reactions and gave near to quantitative yields of products.

Unique sequence in deltorphin C confers structural requirement for δ opioid receptor selectivity

Lazarus, LH,Salvadori, S,Grieco, P,Wilson, WE,Tomatis, R

, p. 791 - 797 (2007/10/02)

A series of deltorphin C (H-Tyr-D-Ala-Phe-Asp-Val-Val-Gly-NH2) analogues were synthesized to assess the consequences of changing anionic and hydrophobic residues on δ receptor selectivity.Analogues with altered C-terminal groups, inverted sequences, or es

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