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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2019 Apr 12;30(6):932–945. doi: 10.1007/s13361-019-02160-3

Table 1.

Threshold voltages and calculated activation energies for [subP+3H]3+ transitions.

conformer
Selecteda Formedb Voltagec Threshold Ead, kJ·mol−1
A B 48 ± 1 42 ± 1
C1 A 32 ± 2 29 ± 2
B 48 ± 2 42 ± 2
C2 B* 32 ± 1 29 ± 1
A 31 ± 6 28 ± 5
B 43 ± 4 38 ± 4
B* A 51 ± 4 44 ± 3
B 63 ± 2 54 ± 2
A [subP-NH3+3H]3+ 85 ± 2 71 ± 2
C1 [subP-NH3+3H]3+ 92 ± 5 76 ± 4
C2 [subP-NH3+3H]3+ 90 ± 4 75 ± 4
B [subP-NH3+3H]3+ 96 ± 5 79 ± 4
A [b10+2H]2+ 92 ± 4 76 ± 4
C1 [b10+2H]2+ 102 ± 6 85 ± 5
C2 [b10+2H]2+ 105 ± 1 87 ± 2
B [b10+2H]2+ 105 ± 5 87 ± 4
a

Mobility peak of [subP+3H]3+ selected for activation.

b

Structure formed during activation of the selected peak.

c

Collisional activation voltage applied in the activation region IA2. The indicated uncertainties in voltage represent the standard deviation from triplicate measurements.

d

Activation energy threshold of the indicated transition, calibrated with equation 2. Activation energy uncertainty was determined through propagation of voltage error and the uncertainty of the energy calibration from ref 44.