Table 2.

Amino acids identified by LC-ESI-MS.

RT (min)	Intensity × 104	[M + H]+ m/z	Elemental Composition	Iminium Ion m/z	Elemental Composition	Compound
1.07	10	156.076	C6H10N3O2	—		Histidine
	35	175.119	C6H15N4O2	—		Arginine
1.28	2	90.055	C3H7NO2	—		Alanine
	4	106.050	C3H8NO3	—		Serine
	180	116.070	C5H10NO2	70.065	C4H8N	Proline
	20	118.086	C5H12NO2	72.081	C4H10N	Valine
	6	120.065	C4H10NO3	—		Threonine
	4	133.061	C4H9N2O3	—		Asparagine
	9	134.045	C4H8NO4	—		Aspartic acid
	100	148.060	C5H10NO4	102.050	C4H8NO2	Glutamic acid
1.55	3	150.058	C5H12NO2S	—		Methionine
1.69	30	132.102	C6H14NO2	86.096	C5H12N	L/I *
1.76	14	182.081	C9H12NO3	—		Tyrosine
2.56	4	166.086	C9H12NO2	120.081	C8H10N	Phenylalanine
4.33	1	205.097	C11H13N2O2	—		Tryptophan

* Either leucine (L) and/or isoleucine (I).