what is a pattern recognition receptor
pattern recognition receptor. A receptor on an antigen-presenting cell of the immune system that recognizes molecular sequences found on disease-causing organisms but not host cells.PRRs detect the presence of pathogen-associated chemicals such as lipopolysaccharides, mannans, and teichoic acids. receptor on an antigen-presenting cell of the immune system that recognizes molecular sequences found on disease-causing organisms but not host cells. PRRs detect the presence of pathogen-associated chemicals such as lipopolysaccharides, mannans, and teichoic acids.