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The primary sources for occurrence of alkaline protease producers were found alkaline habitats viz. soil and water of soda lakes and deserts beside alkaline springs. Among bacteria, many efficient alkaline protease producers belong to the genus Bacillus. Alkaline proteases are the most versatile industrial enzymes that execute a variety of functions and have tremendous important biotechnological applications. Keeping in view the industrial importance of the alkaline proteases and their producers, research is now being focusing on the discovery of the alkaline proteases with novel intrinsic properties.