首页>
外国专利>
method for enzymatic synthesis of peptides or to enzymatic cleavage of the racemiske carboxylic acids
method for enzymatic synthesis of peptides or to enzymatic cleavage of the racemiske carboxylic acids
展开▼
机译:肽酶促合成或消旋消旋羧酸的酶切方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
The present invention provides a membrane method for the enzymatic synthesis of peptides accomplished by shifting the chemical equilibrium that exists in a reaction mixture between charged or ionized reacting amino acids and uncharged or non-ionized peptide product in the presence of a proteolytic enzyme such as thermolysin. The equilibrium is shifted by diffusion of the unchanged peptide product across an ion-rejection membrane which removes the uncharged peptide from the reaction mixture and preferably the diffused uncharged peptide is quickly converted to a charged species that cannot back-diffuse into the reaction mixture so that the uncharged peptide is effectively "pulled" across the membrane. An enzymatic conversion of the uncharged species utilizing an esterase having proteolytic activity such as aminoacylase I is disclosed. Copermeating reactants can be separated from the product mixture and returned to the reaction mixture. Also, the ion-rejection membrane can be utilized to resolve enantiomers of racemic carboxylic acids including D,L-amino acids.
展开▼