Next, energy is emitted from {TAIL ~ a source} sufficient to heat tissue to form {HEAD ~ a denatured proteinaceous substance} 
Next , energy is emitted from { TAIL ~ a source } sufficient to heat tissue to form { HEAD ~ a denatured proteinaceous substance }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD