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