In an attempt to acquire a product that permeabilizes cell membranes, we were referred to you. We are specifically interested in Streptolysin O and alpha toxin, both of which are membrane pore forming toxins. If you have any information on where we can obtain these substances, it would be greatly appreciated if you would forward that imformation. In addition, any other membrane pemeabilization agent that you are aware of would also be appreciated. Thank you Heidi VanScoy, University of Pennsylvania
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