Fig. 3
From: Genome-wide analysis of DNA methylation in bronchial washings
Association between methylation levels and smoking status. Methylation levels of nine CpGs were compared among never-smokers (a), former smokers (b), and current smokers (c). The X-axis represents UCSC gene names in which nine CpGs are present. The Y-axis represents sample identification numbers. Methylation levels are represented in a gradation of colors from green (0%) to yellow (30%) to red (100%)