serine protease (site 1 protease), cleaves [[protein|AB2A3422277040107AAF90358BBE58608F8E0738]] to prepare it for [[protein|85247AD09B7A472607B32D57E6318BA6C83EC6BA]] cleavage, this results in pro-[[protein|24F7FD5C7C3A68BB2760ABB8CBD8FBD65E5FF7D4]] processing/activation in the mother-cell, does also cleave [[protein|85247AD09B7A472607B32D57E6318BA6C83EC6BA]]