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Endotoxin protein (EP) was isolated from the TCA-extracted lipopolysaccharide (LPS) of Salmonella minnesota R595 by the use of aquous phenol. The EP stimulated human B lymphocytes to synthesize DNA, even though T lymphocytes were depleted with the nylon column method, the E-rosetting method, or the mouse anti-human monoclonal antibody and complement. However, it is not concluded whether the EP is a human T-independentdoi:10.2177/jsci.5.220 fatcat:b6ay4dyzevgehayxaythvbhrou