{HEAD ~ These peptides} can be recognised by CTL and elicit {TAIL ~ an immune response}, and are therefore ideal tumour specific markers 
elicit
{ HEAD ~ These peptides } can be recognised by CTL and elicit { TAIL ~ an immune response } , and are therefore ideal tumour specific markers
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH