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