Relative purine composition of airway secretions
| Sample | ATP | ADP | AMP | Ado |
| Healthy Sputum | 2.8±0.5 | 9.8±1.9 | 36.2±4.3 | 51.2±4.9 |
| CF | ||||
| Sputum | 8.0±3.5 | 1.5±0.7 | 84.8±7.0 | 5.7±3.0 |
| SMM | 14.1±3.1 | 9.1±1.9 | 69.5±5.5 | 7.2±1.7 |
| BALF | 2.3±0.2 | 2.7±0.8 | 82.9±4.0 | 12.0±3.9 |
Data are presented as mean±se relative percentages of each purine. The pattern of airway purines was similar in the various types of airway sample, but differed in healthy versus cystic fibrosis (CF) subjects. ATP: adenosine triphosphate; ADP: adenosine diphosphate; AMP: adenosine monophosphate; Ado: adenosine; SMM: supernatant of mucopurulent material; BALF: bronchoalveolar lavage fluid.