Natural recognition repertoire and the evolutionary emergence of the combinatorial immune system

Abstract excerpt

The primordial combinatorial immune recognition repertoire arose in the evolution of jawed vertebrates approximately 450 million years ago as a rapid genetic process independent of antigenic selection. We propose that it encompassed the entire repertoire of innate immunity involving molecules that had evolved over billions of years. The 'antigen-driven' compartment involving invasive pathogens operates in 'real...

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