The method 1, wherein {TAIL ~ the mass spectrum} is obtained from {HEAD ~ a MALDI mass spectrometer} 
The method 1 , wherein { TAIL ~ the mass spectrum } is obtained from { HEAD ~ a MALDI mass spectrometer }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD