Table I. Summary of N-glycan masses and compositions for three Penicillium species. Calculated m/z values for predicted N-glycans as [M+H]⁺ and [M-H]⁻ are listed; for observed values refer to the figures. All compositions are as H_xN_yPE/PC_z, other than for the four marked with an asterisk, are corroborated with MS/MS data as well as, in many cases, by chemical and enzymatic treatments as discussed in the text. Qualitative assessments of abundance, based on fluorescence intensities of HPLC fractions, are indicated by +++, ++, +, trace or n.d. (not detected); H is hexose, N, N-acetylhexosamine, PC phosphorylcholine and PE phosphoethanolamine.

Composition	[M+H]+	[M-H]−	P. nordicum	P. dierckxii	P. verrucosum
H4N2	1151.44	1149.43	+	+	nd
H5N2	1313.50	1311.48	+	+++	+
H5N2PE	1436.51	1434.49	nd	+	nd
H6N2	1475.55	1473.54	+	+++	+
H6N2PE	1598.56	1596.55	trace	++	nd
H7N2	1637.60	1635.59	+	+++	+
H6N2PC*	1640.61	1638.59	trace	nd	nd
H7N2PE	1760.61	1758.60	trace	++	nd
H8N2	1799.66	1797.64	++	+++	++
H7N2PC*	1802.66	1800.65	trace	nd	nd
H7N2PE2	1883.62	1881.61	nd	+	nd
H8N2PE	1922.67	1920.65	++	+++	nd
H7N2PEPC*	1925.67	1923.65	trace	nd	nd
H9N2	1961.71	1959.70	+++	+++	+++
H8N2PE2	2045.67	2043.66	+	+	nd
H9N2PE	2084.78	2082.76	++	+++	++
H8N2PEPC*	2087.72	2085.71	trace	nd	nd
H10N2	2123.76	2121.75	++	+	+++
H9N2PE2	2207.73	2205.71	trace	+	nd
H10N2PE	2246.77	2244.76	++	++	+++
H11N2	2285.82	2283.80	++	trace	++
H10N2PE2	2369.78	2367.77	nd	+	nd
H11N2PE	2408.82	2406.81	++	+	++
H12N2	2447.87	2445.85	+	trace	++
H10N2PE3	2492.79	2490.77	nd	+	nd
H11N2PE2	2531.83	2529.82	+	trace	nd
H12N2PE	2570.88	2568.86	trace	trace	++
H13N2	2609.92	2607.91	+	trace	+
H13N2PE	2732.93	2730.92	trace	trace	+
H14N2	2771.97	2769.96	trace	nd	+
H14N2PE	2894.98	2892.97	trace	nd	nd
H15N2	2934.03	2932.01	trace	nd	trace
H16N2	3096.08	3094.06	trace	nd	trace