For example, the phosphorylation site of a phosphopeptide can be determined by a mechanism in which the phosphopeptide first binds to one of the metals in the ESI capillary, then an electron is removed from {HEAD ~ the metal} by {TAIL ~ the corona discharge electrochemical ionization process} 
by
For example , the phosphorylation site of a phosphopeptide can be determined by a mechanism in which the phosphopeptide first binds to one of the metals in the ESI capillary , then an electron is removed from { HEAD ~ the metal } by { TAIL ~ the corona discharge electrochemical ionization process }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL