This molecule is inactive and must be cleaved by trypsin, and then by other chymotrypsin molecules before it can reach its full activity.
... 18 to 24, 22.3% from 25 to 44, 28.7% from 45 to 64, and 28.1% who are 65 years of age or older. The median age is 50 years. For every 100 females there are 86.7 males. ...