“…GM crops and their use as food sources have aroused public safety concern. Polymerase chain reaction (PCR) has become a common method of screening, detecting or quantifying GM content (Berdal & Holst-Jensen, 2001;Lau, Collins, Yiu, Xing, & Yu, 2004;Peano, Samson, Palmieri, Gulli, & Marmiroli, 2004;Watanabe et al, 2004).…”