In addition to {HEAD ~ the sequence variation} between {TAIL ~ the various hh homologs}, the vertebrate hedgehog proteins are apparently present naturally in a number of different forms, including a pro form, a full length mature form, and several processed fragments thereof 
In addition to { HEAD ~ the sequence variation } between { TAIL ~ the various hh homologs } , the vertebrate hedgehog proteins are apparently present naturally in a number of different forms , including a pro form , a full length mature form , and several processed fragments thereof
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH