Homology, used {HEAD ~ interchangeably herein} with the term identity refers to sequence {TAIL ~ similarity} between two protein or between two nucleic acid molecules 
Homology , used { HEAD ~ interchangeably herein } with the term identity refers to sequence { TAIL ~ similarity } between two protein or between two nucleic acid molecules
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH