Reply to Masin et al: To be or not to be a phospholipase A [Biological Sciences]

In their letter, Masin et al. (1) affirm that a "varying extent of contamination" of adenylate cyclase toxin (ACT) and ACT-S606A purified toxin preparations, by the phospholipase A (PLA) enzyme from the outer membrane (OMPLA) of the producing Escherichia coli cells, could easily account for our finding that ACT has...

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