Specific detection of soybean residues in processed foods by the polymerase chain reaction

A sensitive qualitative detection method for soybeans in foods by using the polymerase chain reaction (PCR) was developed. For specific detection of soybeans with high specificity, the primer pair of Gym 81/Gym 82 was designed on the gene encoding the Glycine max repetitive sequence. The trace amount of soybeans in commercial food products could be qualitatively detected by this method.