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Immunity protein 44 A predicted immunity protein with an alpha+beta fold. Proteins containing this domain are present in bacterial polymorphic toxin systems as an immediate gene neighbour of the toxin gene, usually containing a domain of the Tox-URI1, Tox-URI2 or Tox-ParBL1 families. The gene for this toxin is also found in heterogeneous poly-immunity loci that show variations in structure even between closely related strains.
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