{HEAD ~ Further processing} of the mature form apparently occurs in {TAIL ~ some instances} to yield biologically active fragments of the protein 
apparently occurs in
{ HEAD ~ Further processing } of the mature form apparently occurs in { TAIL ~ some instances } to yield biologically active fragments of the protein
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH