Proteinase activity,culture conditions,hydrolysis conditions and peptone recovery rate were studied for the feasibility of producing peptone by hydrolyzing fish protein with Bacillus subtilis culture.

• 对枯草芽孢杆菌胞外蛋白酶的产生条件及其培养液水解鱼蛋白质制备蛋白胨进行了初步研究。