Aprotinin biochemical product blog Tags: Aprotinin; Biochemical; Aprotinin biochemical; Posted by mybiosource_staff on . The Aprotinin n/a (Catalog #MBS545431) is a Biochemical and is intended for research purposes only. The product is available for immediate purchase.To buy or view more detailed product information and pricing, please click on the technical datasheet page below:APROTININ (Bovine Lung)Grade: High Purity GradeCAS Number: [9087-70-1].