Shimadzu instrument model electrospray ionization quadrupole/quadrupole/quadrupole conversion dynode electron multiplier MKKDIHPKYE EITASCSCGN VMKIRSTVGH DLNLDVCSKC HPFFTGKQRD VATGGRVDRF NKRFNIPGS 515.583962 189.086983 18.239807 518.255361 189.086983 18.239807 497.234187 305.181946 19.381167 501.241287 313.196145 19.381167