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Lactate Dehydrogenase Polyclonal Antibody Sandwich ELISA for Determination of Endpoint Heating Temperatures of Ground Beef

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Abstract:

An enzyme-linked immunosorbent assay (ELISA) for the protein marker lactate dehydrogenase (LDH) was developed to determine endpoint heating temperature (EPT) of ground beef. Ground beef was placed in 10 by 75 mm tubes and heated to temperatures between 62 and 74°C at 2°C intervals. Electrophoresis and immunoblotting of meat extracts indicated a decrease in the intensity of the LDH band as temperature was increased. Polyclonal antibodies (PAb) against bovine muscle LDH were produced and a sandwich ELISA devised using biotinylated PAb as the detecting antibody. The LDH content decreased (P < 0.05) in ground beef heated between 66 and 74°C and was less than 4 μg/g of meat at the recommended minimum endpoint of 69°C. The ELISA was used to estimate the EPT of commercially cooked beef patties.

Keywords: BEEF; ELISA; ENDPOINT TEMPERATURE; LACTATE DEHYDROGENASE

Document Type: Research Article

Affiliations: Department of Food Science and Human Nutrition, Michigan State University, East Lansing, Michigan 48824-1224 USA

Publication date: January 1, 1996

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