NOS3 and pulmonary arterial hypertension: Indeed, when we plotted GlycNAcylated eNOS vs. UDP-GlcNAc for each donor, UDP-GlcNAc did not correlate with O-GlcNAcylated eNOS (Figure 4B) for non-PAH (R2 = 0.12) or PAH HPAECs (R2 = 0.19).