Standard:
Everything is 100% correct, all chains are assigned correctly. Position
assignments are always correct, but in two cases, no position was assigned.


Not detected:
(1) 	34:0 there are no MS/MS spectra
	34:1 there are no MS/MS spectra
	36:0 not detected (MS1 peak is in noisy region)
	36:4 not detected (MS1 detects strong PC peak; a strong PC isotopic peak is between PE an PC -> removed since MS1 algorithm assumes this peak to be from another isotope)

(2) 	32:0 there are no MS/MS spectra
	34:0 there are no MS/MS spectra
	36:0 not detected (+1 isotope is in noisy region)
	36:4 not detected (MS1 detects strong PC peak; a strong PC isotopic peak is between PE an PC -> removed since MS1 algorithm assumes this peak to be from another isotope)

(3) 	32:0 there are no MS/MS spectra
	34:0 not detected (+1 isotope is in noisy region)
	34:1 not detected (removed by rules, since neighboring PE_H 36:4 causes too strong fragments)
	36:0 there are no MS/MS spectra
	36:4 not detected (MS1 detects strong PC peak; a strong PC isotopic peak is between PE an PC -> removed since ms1 assumes this peak to be from another isotope)


Biological:
For the PE_Na adduct, are only spectra for 38:4 present, and one time for 38:5. There are only few FPs.