EC Number   |
pH Minimum |
pH Maximum |
Reference |
|---|
   3.4.21.1 | -999 |
- |
optimal pH of chymotrypsin A and B are 7.5 and 8.0, respectively, at 37°C |
708555 |
| 3.4.21.1 | 4 |
9 |
chymotrypsin isoform Kh2 |
667239 |
| 3.4.21.1 | 4 |
9 |
low activity chymotrypsin I and II at acidic pH (45), considerably activity at pH from 6 to 9 |
708549 |
| 3.4.21.1 | 4 |
9 |
pH 4.0: about 50% of maximal activity, pH 9.0: about 60% of maximal activity |
753641 |
| 3.4.21.1 | 4 |
11 |
low activity of chymotrypsin I and II at acidic pH (4-5), considerably activity at pH from 6 to 9 whilst chymotrypsin I shows the highest activity toward the alkaline pH (7-11) |
708549 |
| 3.4.21.1 | 4.5 |
9.8 |
approx. 1% of maximal activity at pH 4.5, approx. 5% of maximal activity at pH 9.8 |
653202 |
| 3.4.21.1 | 5 |
7 |
chymotrypsin isoform Kh3 |
667239 |
| 3.4.21.1 | 5 |
9 |
chymotrypsin isoform Kh1 |
667239 |
| 3.4.21.1 | 5 |
10 |
retains more than 80% activity over the pH range 5-10 |
679953 |
| 3.4.21.1 | 6 |
9 |
pH 6.0: about 80% of maximal activity, pH 9.0: about 55% of maximal activity |
754581 |
