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A recessive nonsense mutation in the zebrafish recombination activating gene 1 (rag1) gene results in defective V(D)J recombination; however, animals homozygous for this mutation (rag1 −/− ) are reportedly viable and fertile in standard, nonsterile aquarium conditions but display increased mortality after intraperitoneal injection with mycobacteria. Based on their survival in nonsterile environments,...
Both inhibitory and activating forms of natural killer (NK) cell receptors are found in mammals. The activating receptors play a direct role in the recognition of virally infected or transformed cells and transduce activating signals into the cell by partnering with an adaptor protein, which contains a cytoplasmic activation motif. Activating NK receptors encoded by the mammalian leukocyte receptor...
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