Statement I: 'Cry' proteins are named so because they are crystal proteins.
Statement II: In acidic environment of insect midgut, 'Cry' proteins gets solubilised and then release toxic core fragments after proteolytic digestion.
Text Solution
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The cry gene of Bacillus thuringiensis produces a protein, that forms crystalline inclusions, i.e., protein is crystal in nature in the bacterial spores. Due to their crystal nature, these proteins are named 'Cry' proteins and are responsible for the insecticidal activities of the bacterial strains. In alkaline environment of insect midgut, 'Cry' proteins are solubilised. Then to release core toxic fragments, these proteins undergo proteolytic digestion.
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