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  • Title: The isolation and partial characterization of trypsinogen, pancreatic secretory trypsin inhibitor and multiple forms of chymotrypsinogen and trypsin from the pancreas of the ostrich (Struthio camelus).
    Author: Smith N, Naudé RJ, Oelofsen W, Lazure C, Patthy A.
    Journal: Int J Biochem; 1992 Jun; 24(6):877-85. PubMed ID: 1612178.
    Abstract:
    1. PSTI, two chymotrypsinogens and two trypsins were purified to homogeneity by acid extraction, salt fractionation, SP-Sephadex C-50 chromatography and RP-HPLC. 2. A third chymotrypsinogen, a trypsinogen and another trypsin were purified using an alkaline extraction procedure, followed by Trasylol- and Benzamidine-Sepharose affinity chromatography and hydroxylapatite chromatography. 3. The enzymes differed in amino acid composition as well as in specific activities towards synthetic amidase and esterase substrates. 4. N-terminal amino acid sequences were determined for one chymotrypsinogen and one trypsin.
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