Abstract
d-Hydantoinase from the lentil, Lens esculenta, seed is quite unstable, and has been immobilized on Diethyl amino ethyl (DEAE) cellulose by an adsorption and cross-linking method. The immboilized d-hydantoinase exhibited 80% enzyme activity and contained 86% protein. The immobilization of the enzyme preparation does not change its optimum pH, temperature or affinity constant, but increases its shelf-life, thermostability and stability in various organic solvents. This immobilized d-hydantoinase can be used effectively for the production of d-amino acids from the corresponding hydantoins and may therefore be of use in the chemical and pharmaceutical industries.
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