Figure 2. Plasma DPP-4 activity.

DPP-4 activity following the first following dose of sitagliptin (started on day -1) shown as percentages of baseline, comparing the residual activity in patients treated with sitagliptin 600 mg every 12 hours on the current study with those receiving sitagliptin 600 mg once daily (black curve) and red blood cell depleted UCB transplants, previously reported (red curve).⁹ Times of sitagliptin administration are indicated by “X” at the bottom of the figure.

^*Indicate trough levels.