The article discusses research being done on Nod-like receptor (NLR) family, apoptosis inhibitory protein (NAIP). It references the study "Innate immune recognition of bacterial ligands by NAIPs determines inflammasome specificity," by E. M. Kofoed and R. E. Vance on the August 28, 2011 issue of the journal "Nature." Findings suggest that NAIP family members serve as pathogen sensors in inflammasome activation.