In addition to {TAIL ~ hedgehog} polypeptide, {HEAD ~ a TGF β factor} may also be utilized in the method of the invention 
In addition to { TAIL ~ hedgehog } polypeptide , { HEAD ~ a TGF β factor } may also be utilized in the method of the invention
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH