Fig. 2From: P2X7 1513A/C loss-of-function polymorphism and active tuberculosis disease in a cohort of Egyptian population: a pilot studyA P2X7 receptor 1513A/C genotypes frequency distribution among studied population regarding previous history of old TB; B P2X7 receptor 1513A/C genotypes distribution among smoker (either active or former smokers) and non-smoker subjects included in the studyBack to article page