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Forty-three Bacillus thuringiensis isolates from Brazil and 3 from Agentina were screened, using the polymerase chain reaction (PCR), for various coleoptera-specific cry genes. Seven isolates produced specific and/or nonspecific DNA fragments in a PCR reaction with primers specific for two coleopteran cry genes and 4 of these produced DNA fragments with primers specific for 7 known coleopteran cry...
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