Table II

Quadrupole-selected precursor ions for an ECD-experiment (shown in Fig. 6)

Ion detectedMH+determinedMH+calculatedAssignment
A. 1121.5547 (12+)13447.613450.5H2B.1
B. 1122.9312 (12+)13464.113464.5H2B.1+ Me
C. 1124.0862 (12+)13477.913478.5H2B.1+ Me2
Embedded Image Embedded Image (12+)a13491.613492.5H2B.1 + 42
E. 1126.5431 (12+)13507.413508.5H2B.1 + 42+O
F. 1127.6409 (12+)13520.613520.5H2B.1 + 42+ 28
Embedded Image Embedded Image (12+)13534.613534.5H2B.1 + 2× 42
H. 1130.2974 (12+)13552.513552.5H2B.2 + 42+ 14
I. 1131.4025 (12+)13565.713566.5H2B.2 + 42+ 28
J. 1133.3576 (12+)13577.213576.5H2B.1 + 3× 42
  • a The most abundant components are underlined.