{TAIL ~ The method} includes inactivating {HEAD ~ endogenous enzyme activities} using neutral organic solvents in conjunction with a matrix having minimal background noise  
{ TAIL ~ The method } includes inactivating { HEAD ~ endogenous enzyme activities } using neutral organic solvents in conjunction with a matrix having minimal background noise
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH