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Papain-induced Oligomerization of α-Amino Acid Esters

✍ Scribed by Gregory Anderson; Pier Luigi Luisi

Publisher
John Wiley and Sons
Year
1979
Tongue
German
Weight
481 KB
Volume
62
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Oligomers of leucine, methionine, phenylalanine, and tyrosine were prepared enzymatically (using papain) from the respective methyl esters, with yields ranging from 51–96%. The effect of pH, buffer and salt concentration, and addition of alcohol on the oligomerization of leucine methyl ester was examined. The limits and potentialities of the enzymatic reaction as a method for obtaining monodisperse oligomers are discussed.

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Lanthanide ion-induced hydrolyses of alk
Lanthanide ion-induced hydrolyses of alkyl esters and amides of α-amino acids
✍ Tohru Takarada; Rei Takahashi; Morio Yashiro; Makoto Komiyama 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 124 KB 👁 1 views

Lanthanide ion-induced hydrolyses of methyl esters, ethyl esters, and amides of a-amino acids were systematically studied. In the hydrolysis of the alkyl esters, all the lanthanide ions are effective and the catalytic activities decrease in the order Ce(III), Nd(III) b Sm(III) b Eu(III) b Gd(III), C