However, the inclusion of {TAIL ~ a human gamma constant region} on a transgene is not required to achieve {HEAD ~ such maturation} 
However , the inclusion of { TAIL ~ a human gamma constant region } on a transgene is not required to achieve { HEAD ~ such maturation }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD