Transgenic animals for producing {HEAD ~ specific isotypes} of {TAIL ~ human antibodies} via non cognate switch regions 
Transgenic animals for producing { HEAD ~ specific isotypes } of { TAIL ~ human antibodies } via non cognate switch regions
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH