Obejective: To research the reacting mechanism and kinetics characteristics of pepsin inhibitor from fermentation by Coriolus versicolor.Method:Using Lineweaver-Bunk doubLe reciprocal method and UltroGelACA-54 gel filtration. Result: It was intracellular product and was consisted of protein,the molecular weight was 23100,the Ki was 0.996 μmol/L.Conclusion: The inhibitory type to pepsin was the complex of non-competitive and anti-competitive inhibitory mode.The combined mode of the inhibitor and pepsin was: ...