Table 2.

Gender-specific metabolites identified in exhaled breath

Chemical formula	Putative identity	Expression ratio (fold change)	Gender-specific distribution
			Herein obtained results	According to literature
C14H18N2O6	gamma-Glutamyltyrosine	0.66	Male > Female	Male > Female28
C5H9NO2	l-Proline	0.86	Male > Female	Male > Female31
C9H11NO3	l-Tyrosine	0.84	Male > Female	Male > Female31
C4H6O5	Malate	0.81	Male > Female	Male > Female28
C5H12N2O2	l-Ornithine	0.76	Male > Female	Male > Female31
C5H4N4O3	Uric acid	0.66	Male > Female	Male > Female28
C3H7NO3	d-Serine	1.27	Female > Male	Female > Male31
C5H4N4O	Hypoxanthine	1.93	Female > Male	Female > Male28
C6H8O6	Ascorbic acid	0.74	Male > Female	Female > Male28
C14H26O2	Myristoleic acid	0.81	Male > Female	Female > Male28
C40H80NO7P	PC(P-18:0/14:0)	0.62	Male > Female	Female > Male31
C4H8O5	Threonic acid	0.54	Male > Female	Female > Male28
C6H12O5	1,5-Anhydrosorbitol	1.19	Female > Male	Male > Female28
C17H31NO4	9-Decenoylcarnitine	1.31	Female > Male	Male > Female31
C11H12N2O2	l-Tryptophan	1.35	Female > Male	Male > Female31
C5H11NO2S	l-Methionine	2.89	Female > Male	Male > Female31
C28H50NO7P	LysoPC(20:4/0:0)	1.74	Female > Male	Male > Female31
C16H31NO4	Nonanoylcarnitine	1.23	Female > Male	Male > Female31
C10H19NO4	Propionylcarnitine	1.22	Female > Male	Male > Female31

These metabolites have been described in previous literature for other bio-fluids such as blood and urine (HMDB gender database). This table provides the gender-specific distribution of these metabolites indicating the consistency of the respective obtained distribution with the pattern observed in published literature.