Cloning and Expression of Two Crystal Protein Genes, <i>cry30Ba1</i> and <i>cry44Aa1</i> , Obtained from a Highly Mosquitocidal Strain, <i>Bacillus thuringiensis</i> subsp. <i>entomocidus</i> INA288

Abstract

Two novel crystal protein genes, cry30Ba and cry44Aa, were cloned from Bacillus thuringiensis subsp. entomocidus INA288 and expressed in an acrystalliferous strain. Cry44Aa crystals were highly toxic to second-instar Culex pipiens pallens (50% mortality concentration [LC50] = 6 ng/ml) and Aedes aegypti (LC50 = 12 ng/ml); however, Cry30Ba crystals were not toxic.