Peptide and ester synthesis in organic solvents catalyzed by seryl proteases linked to alumina

Abstract
Trypsin and α‐chymotrypsin were immobilized to alumina‐phosphocolamine complex, activated by glutaraldehyde. The immobilized enzymes show a great stability toward organic solvents miscible or immiscible with water. In the presence of a low concentration of water, the immobilized enzymes catalyzed transesterification reactions as well as peptide synthesis. The synthesized peptides were stable toward the immobilized enzymes.