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