Sampled from marine fishes and shells, producing protease strains are isolated with enriching medium , casein isolating medium and proteolytic casein test.

• 采集连云港黄海海域的各类海鱼和贝类及海水等样品,采用富集培养、干酪素培养基及水解酪蛋白试验分离产蛋白酶的菌株。