{TAIL ~ A TSG6 polypeptide} can be delivered by {HEAD ~ a controlled release} or sustained release system 
{ TAIL ~ A TSG6 polypeptide } can be delivered by { HEAD ~ a controlled release } or sustained release system
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH