OFFGEL electrophoresis and fandem mass spectrometry approach compared with DNA-based PCR method for authentication of meat species form raw and cooked ground meat mixture containing cattle meat, water buffalo meat and sheep meat.

Abstract

The present study compared the accuracy of an OFFGEL electrophoresis and tandem mass spectrometry-based proteomic approach with a DNA-based method for meat species identification from raw and cooked ground meat mixes containing cattle, water buffalo and sheep meat. The proteomic approach involved the separation of myofibrillar proteins using OFFGEL electrophoresis, SDS-PAGE and protein identification by MALDI-TOF MS. Species-specific peptides derived from myosin light chain-1 and 2 were identified for authenticating buffalo meat spiked at a minimum 0.5% level in sheep meat with high confidence. Relative quantification of buffalo meat mixed with sheep meat was done by quantitative label-free mass spectrometry using UPLC-QTOF and PLGS search engine to substantiate the confidence level of the data. In the DNA-based method, PCR amplification of mitochondrial D loop gene using species specific primers found 226 bp and 126 bp product amplicons for buffalo and cattle meat, respectively. The method was efficient in detecting a minimum of 0.5% and 1.0% when buffalo meat was spiked with cattle meat in raw and cooked meat mixes.

OFFGEL electrophoresis and tandem mass spectrometry approach compared with DNA-based PCR method for authentication of meat species from raw and cooked ground meat mixtures containing cattle meat, water buffalo meat and sheep meat | Request PDF. Available from: https://www.researchgate.net/publication/316314485_OFFGEL_electrophoresis_and_tandem_mass_spectrometry_approach_compared_with_DNA-based_PCR_method_for_authentication_of_meat_species_from_raw_and_cooked_ground_meat_mixtures_containing_cattle_meat_water [accessed Sep 29 2018].