- kappa particle
Gram negative bacterial endosymbiont of Paramecium spp., ( Caedobacter taeniospiralis), that confers the "killer" trait; infected Paramecium are resistant to the toxin liberated by infected forms. Killing activity is associated with the induction of defective phage in the endosymbiont, leading to the release of R-bodies, coded for by the phage genome and apparently of mis-assembled phage-coat protein.
Dictionary of molecular biology. 2004.
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