. 2013 Apr 25;8(4):e61913. doi: 10.1371/journal.pone.0061913

Table 4. Summary of peptides in the E. coli selC mutant, in which cysteines were found to be substituted by selenocysteine and converted to dehydroalanine during ESI-LTQ-Orbitrap-MS/MS.

Protein ID	Position and type of substitution^*1	Precursor ion mass			Δm [ppm]
		m/z [M+H]⁺ _exp	Charge state	m/z [M+H]⁺ _theor
NarG	GLNDVNu₄₉₃ATSYDDVK	859.8432	+2	1718.6792	1.20
	GLNDVNa₄₉₃ATSYDDVK	790.3660	+2	1579.7247	0.78
	KFSEVu₈₃₈VGHLGK	704.8279	+2	1408.6486	0.06
	Lu₂₉₂DLWLAPK	582.2717	+2	1163.5361	0.10

Charge states of precursor ions that were selected for MS/MS analysis are indicated. Culture conditions and abbreviations are identical to those given in Table 2.