Figure 3: Quantification of the expression level of GM2AP in urine samples from lungcancer patients and healthy controls. GM2AP level was quantified by ELISA in urine of the44 healthy controls and of the 48 lung cancer patients. The expression level of GM2AP wassignificantly increased from 0.21 ± 0.14 ng/mL in controls to 1.60 ± 1.21 ng/mL in patients.Black bars indicate the average levels for GM2AP in lung cancer patients. *: P value < 0.05 compared to the value for urine samples from healthy controls.