Species fraud and product mislabelling in processed food, albeit not being a direct health issue, often
results in consumer distrust. Therefore methods for quantification of undeclared species are needed.
Targeting mitochondrial DNA, e.g. CYTB gene, for species quantification is unsuitable, due to a fivefold
inter-tissue variation in mtDNA content per cell resulting in either an under- (70%) or overestimation
(+160%) of species DNA contents. Here, we describe a reliable two-step droplet digital PCR (ddPCR) assay
targeting the nuclear F2 gene for precise quantification of cattle, horse, and pig in processed meat products.
The ddPCR assay is advantageous over qPCR showing a limit of quantification (LOQ) and detection
(LOD) in different meat products of 0.01% and 0.001%, respectively. The specificity was verified in 14
different species. Hence, determining F2 in food by ddPCR can be recommended for quality assurance
and control in production systems.
Species fraud and product mislabelling in processed food, albeit not being a direct health issue, oftenresults in consumer distrust. Therefore methods for quantification of undeclared species are needed.Targeting mitochondrial DNA, e.g. CYTB gene, for species quantification is unsuitable, due to a fivefoldinter-tissue variation in mtDNA content per cell resulting in either an under- (70%) or overestimation(+160%) of species DNA contents. Here, we describe a reliable two-step droplet digital PCR (ddPCR) assaytargeting the nuclear F2 gene for precise quantification of cattle, horse, and pig in processed meat products.The ddPCR assay is advantageous over qPCR showing a limit of quantification (LOQ) and detection(LOD) in different meat products of 0.01% and 0.001%, respectively. The specificity was verified in 14different species. Hence, determining F2 in food by ddPCR can be recommended for quality assuranceand control in production systems.
การแปล กรุณารอสักครู่..
