Optimization of protease production from a isolate screened from the wast of leather industry.

초록

Feather is composed of over 90% protein, the main component being keratin (1), a fibrous and insoluble protein highly cross-linked with disulphide and other bonds, and represents 5 to 7% of the body weight of the domestic fowl, which generated annually several million tons of feathers as a waste by poultry-processing industries, therefore, its accumulation during the poultry-processing create considerable problems such as environmental pollution.