The complex then dissociates into {HEAD ~ fragment ions} yielding {TAIL ~ valuable structural information} about the peptide such as amino acid sequencing information 
yielding
The complex then dissociates into { HEAD ~ fragment ions } yielding { TAIL ~ valuable structural information } about the peptide such as amino acid sequencing information
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH