. 2018 Sep 21;4:88. doi: 10.1038/s41394-018-0121-4

Table 2.

Variable importance in projection (VIP) features identified by PLS-DA in positive and negative ion mode

VIP features	Peptide sequence/chemical formula	m/z mode (+/−)
Fibrinogen alpha subunit	DSGEGDFLAEGGGVR	733.831 (+)
Fibrinogen alpha subunit	ADSGEGDFLAEGGGVR	768.850 (+)
Fibrinogen beta subunit	Pyro-QGVNDNEEGFFSA	698.786 (+)
Fibrinogen beta subunit	Pyro-QGVNDNEEGFF	619.751 (+)
Fibrinogen alpha subunit	DSGEGDFLAEGGGVR	731.351 (−)
Fibrinogen alpha subunit	SGEGDFLAEGGGVR	673.824 (−)
Fibrinogen beta subunit	Pyro-QGVNDNEEGFF	617.736 (−)
Fibrinogen beta subunit	QGVNDNEEGFFS	661.269 (−)
LysoPC (16:0)	C₂₄H₅₀NO₇P	496.340 (+)