Biochemical properties of the house dust mite (HDM) extracts in the concentration applied in vivo
| Citeq | ALK | Greer | |
| Der p1 (ng) | 100 | 97 | 16.70 |
| Der p2 (ng) | 16 | 43 | 88.36 |
| Total protease activity (U/ml) | 5020.17±30 | 253.8±74 | 75.8±11 |
| Serine protease activity (106 mean V/ml*) | 2221.9±44.8 | 104.4±0.3 | 2.7±1 |
| Cysteine protease activity (106 mean V/ml*) | 891.9±1.3 | 59.6±0.7 | 31.5±2.5 |
| Exochitinase (ß-N-acetylglucosaminidase) levels (10−3 U/ml) | 2.3±0.3 | 124.9±2.2 | 27.2±1.4 |
| Exochitinase (chitobiosidase) levels (10−3 U/ml) | 1±0.03 | 39.7±0.4 | 5.2±0.03 |
| Endochitinase levels (10−3 U/ml) | 1.3±0.03 | 20±0.2 | 5±0.3 |
| Endotoxin (LPS) level (EU/ml) | 7100 | 14 | 527.5 |
The table shows several aspects of the biochemical properties found in the HDM extracts (2.5 mg/ml) when tested on BALB/c mice.
↵* Arbitrary unit.
Der p, Dermatophagoides pteronyssinus; EU, endotoxin unit; HDM, house dust mite; LPS, lipopolysaccharide; U, unit.