Shimadzu instrument model electrospray ionization quadrupole/quadrupole/quadrupole conversion dynode electron multiplier SRVCQVTGKR PVTGNNRSHA LNATKRRFLP NLHSHRFWVE SEKRFVTLRV SAKGMRVIDK KGIDTVLAEL RARGEKY 374.205196 430.727918 13.008792 377.541286 435.732052 13.008792 543.811313 601.366787 21.244253 548.815447 611.375056 21.244253