Processed databases
Atom-Mass pairs
Outputs for Histidine; LC-ESI-IT; MS2; m/z: 154.1; [M-H]-
Database: Metabolon Inc.
Entry ID: MT000022
Synonyms: Histidine
Total mass: 155.1542
Formula: H9 C6 O2 N3
Experimental information
MS type: MS2
Instrument: LTQ XL, Thermo Finnigan
Instrument type: LC-ESI-IT
Ionization: ESI
Ionization mode: NEGATIVE
CAMP general report:
Acceptable mass threshold: 2.0158Out of range queried mass peaks:
Replicated queried mass peaks: 67.2, 92.2, 93.2, 106.2, 107.2, 109.1, 110.2, 112.2, 119.1, 122.1, 125.2, 127.2, 136.1, 137.1, 154.1,
Processing time: 0:00:01.994298
Results for the quried mass "81.2"
| Formula | Mass differences | Num. used protons | Num. required extra protons | Atom names |
| C3O2N1 | 0.170 | 1 | 0 | C1,C5,C6,N7,O10,O11 |
| C5O1 | 0.108 | 5 | 1 | C1,C2,C4,C5,C6,O10 |
| C5O1 | 0.108 | 5 | 0 | C1,C2,C4,C5,C6,O11 |
| C4O1N1 | 0.127 | 3 | 0 | C1,C4,C5,C6,N7,O10 |
| C4O1N1 | 0.127 | 3 | 0 | C1,C4,C5,C6,N9,O10 |
| C4O1N1 | 0.127 | 3 | 0 | C1,C4,C5,C6,N7,O11 |
| C4O1N1 | 0.127 | 3 | 0 | C1,C4,C5,C6,N9,O11 |
| C5N1 | 0.085 | 7 | 1 | C1,C2,C3,C4,C5,N9 |
| C5N1 | 0.085 | 7 | 1 | C1,C2,C4,C5,C6,N7 |
| C4N2 | 0.104 | 5 | 0 | C1,C2,C3,C4,N8,N9 |
| C4O2 | 0.151 | 1 | 0 | C1,C4,C5,C6,O10,O11 |