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