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What does PA stand for?

PA stands for Protective Antigen (microbiology)

This definition appears very frequently and is found in the following Acronym Finder categories:

  • Science, medicine, engineering, etc.

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Other Resources:
We have 249 other meanings of PA in our Acronym Attic

Samples in periodicals archive:

This could be due to its putative mechanism of action compared to other monoclonal candidates under development - binding to protective antigen and inhibiting heptamer (spore) formation, rather than inhibiting binding of toxin to its receptor.
Postscript Back to Reality: Urgent Questions That Can and Should be Answered Immediately In assessing pandemic risk, we seem to have forgotten that influenza virus contains not 1, but 2 immunogenic protective antigens.