Characterization of cry genes in a Mexican bacillus thuringiensis strain collection - Abarca, Carolina.; Bravo, Alejandra.; Lina, Laura.; Lopez, Lorena.; Nunez-Valdez, Maria-Eugenia.; Ontiveros, Hernesto.; Ortiz, Anabel.; Ortiz, Miriam.; Pena, Guadalupe.; Quintero, Rodolfo.; Sarabia, Sergio.; Soberon, Mario.; et al.