 During the Starlink corn recalls in 2000, a variety of GM maize containing the "Bacillus thuringiensis" (Bt) protein Cry9C, was found contaminating corn products in U.S. supermarkets and restaurants.It was also found in Japan and South Korea.Starlink corn had only been approved for animal feed as the Cry9C protein lasts longer in the digestive system than other Bt proteins raising concerns about its potential allergenicity.