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Improved multiplex PCR for the toxins using the new STh primers that amplify a longer, 120-bp fragment. Lanes: 1, 100-bp ladder; 2, E57 (LT/STp); 3, E88 (LT/STh); 4, E133 (LT/STp); 5, E382 (STp); 6, E865 (STh); 7, 286C2 (LT); 8, ST64111 (STh); 9, Re117a (STh); 10, XC110a (LT/STp); 11, E640 (LT/STh); 12, master mix.
