Figure 3
From: Identification of hypoxanthine as a urine marker for non-Hodgkin lymphoma by low-mass-ion profiling
Identical ESI-MS/MS pattern obtained from 137.08 m/z ion in urine and hypoxanthine. A. Mass shift of the 137.08-m/z ion in urine in LTQ-XL analysis. In a direct urine analysis without LC separation, the urine candidate 137.08-m/z ion and hypoxanthine (HX) were monitored as 137.70 m/z. B. The ESI-MS/MS pattern of the 137.08-m/z ion in urine was identical to that of HX. C. Mass-peak area of the 137.08-m/z ion and HX concentration were positively correlated; however, this relationship did not reach statistical significance.