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Ｂａｃｉｌｌｕｓｓｕｂｔｉｌｉｓ Ａ３０ 产生的拮抗蛋白质对多种植物病原真菌有较强的拮抗作用⒚它具有抗酸、抗碱、抗热和抗蛋白酶的性质，其分子量大于３０ ｋＤ⒚２０％ 饱合度的硫酸胺可使拮抗蛋白质基本沉淀⒚至少有一个拮抗蛋白质的活性部位存在于由小于 ３ ｋＤ 的肽段所构成的结构域中⒚
Antagonistic proteins produced by Bacillussubtilis A30 are more antagonistic to a variety of phytopathogenic fungi. They have acid-fast, alkali-resistant, heat-resistant and protease-resistant properties. Amidolytic enzymes with a molecular weight greater than 30 kD⒚20% Basically, at least one active site that antagonizes the protein is present in a domain of peptides smaller than 3 kD