Raw material selection and analysis for the isolation of...

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving hydrolase

Reexamination Certificate

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C435S183000, C435S219000

Reexamination Certificate

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06872544

ABSTRACT:
A method for assaying the proteinase inhibitor content of tissue of a plant. The proteinase inhibitor and other protein products are extracted from the plant tissue by preparing a mixture of solvent and comminuted plant tissue to form a solid fraction and a liquid fraction which contains the proteinase inhibitor and other protein products. The liquid fraction is heated to a temperature and for a time period sufficient to denature at least some of the other protein products without substantially denaturing the proteinase inhibitor. The denatured, undesired protein products are removed by centrifugation or filtering to prepare a clarified extract solution. The amount of proteinase inhibitor inhibitor in the clan ed extract is measured. If the assay is used in the selection of plant tissues for use in the extraction of proteinase inhibitor, plant tissues with a proteinase inhibitor content less than a pre-selected standard are rejected.

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patent: WO-09901474 (1999-01-01), None
patent: WO-0005406 (2000-02-01), None
Walsh et al., “Two Kunitz-type proteinase inhibitors from potato tubers”, Plant Physiology 97 (1) : 15-18 (1991).*
Mosolov et al., “Isolation from potato tubers of an inhibitor of trypsin and chymotrypsin”, Biokhimiya 39 (5) : 956-963 (1974).*
Melville, J.C. and Ryan, C.A., “Chymotrypsin inhibitor I from potatoes”,J. Biological Chem., 1972, 247: p. 3445-3453.
Ryan, C.L., “Purification and properties of a carboxypeptidase inhibitor from potatoes”,J. Biol. Chem., 1974, 249: p. 5495-5499.
Bryant, J.; Green, T.R.; Gurusaddaiah, T.; and Ryan, C.L. “Proteinase inhibitor II from potatoes: Isolation and characterization of its protomer components”,Biochemistry, 1976, 15: p. 3418-3424.
Ryan, C.A.; Kuo, T.; Pearce, G.; and Kunkel, R., “Variability in the concentration of three heat stable proteinase inhibitor proteins in potato tubers”,American Potato Journal, 1976, 53: p. 443-454.

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