And these hormones are known as pro hormones. So one example of such a hormone that is activated via proteolytic activation is insulin. So many hormones are synthesized in their zymogen form and must be activated via the process of proteolytic cleavage. And one common example is insulin. And this is the hormone that is basically used to regulate the glucose level, the sugar level in our blood. So our cells first synthesize insulin in the prepro insulin form.