The invention also relates to host cells and to transgenic non human animals which harbor {HEAD ~ the regulatory nucleic acid sequences} of {TAIL ~ the invention} 
of
The invention also relates to host cells and to transgenic non human animals which harbor { HEAD ~ the regulatory nucleic acid sequences } of { TAIL ~ the invention }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL