Leukotoxin (LtxA). from oral pathogen Aggregatibacter actinomycetemcomitans. is a secreted membrane-damaging protein. LtxA is internalized by β2 integrin LFA-1 (CD11a/CD18)-expressing leukocytes and ultimately causes cell death; however. https://chefesquipmenters.shop/product-category/butter-dishes/