Fig.Ā 2From: Second generation multiple reaction monitoring assays for enhanced detection of ultra-low abundance Mycobacterium tuberculosis peptides in human serumStratification of patient samples by HIV status, sputum smear microscopy status, and geography. Each column indicates a single patient (nĀ =Ā 40). Black circles indicate the presence of each protein (rows) determined by a normalized TPA of one or more peptides above the healthy threshold. Geography is indicated by: B Bangladesh, P Peru, S South Africa, V VietnamBack to article page