{HEAD ~ A method} of preparing the polypeptide, said method comprising {TAIL ~ the steps} of: 
{ HEAD ~ A method } of preparing the polypeptide , said method comprising { TAIL ~ the steps } of :
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH