Table I.

SEQUEST filtering criteria used for peptide identifications

Charge state	ΔCn	Xcorr	Tryptic ends
1+	≥0.05	≥1.7	Fully
1+	≥0.1	≥1.5	Fully
1+	≥0.05	≥3.0	Partially
1+	≥0.16	≥2.8	Partially
2+	≥0.05	≥2.8	Fully
2+	≥0.1	≥2.7	Fully
2+	≥0.16	≥2.3	Fully
2+	≥0.05	≥3.8	Partially
2+	≥0.1	≥3.7	Partially
2+	≥0.16	≥3.5	Partially
3+	≥0.05	≥3.5	Fully
3+	≥0.1	≥3.3	Fully
3+	≥0.16	≥3	Fully
3+	≥0.05	≥4.6	Partially
3+	≥0.1	≥4.5	Partially
3+	≥0.16	≥4.3	Partially