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