Processed databases
Atom-Mass pairs
Outputs for L-Histidine; LC-ESI-QQ; MS2; CE:40 V; [M-H]-
Database: Institute for Advanced Biosciences, Keio Univ.
Entry ID: KO000961
Synonyms: His, (S)-alpha-Amino-1H-imidazole-4-propionic acid, L-Histidine
Total mass: 155.1542
Formula: H9 C6 O2 N3
Experimental information
MS type: MS2
Instrument: API3000, Applied Biosystems
Instrument type: LC-ESI-QQ
Ionization mode: NEGATIVE
CAMP general report:
Acceptable mass threshold: 2.0158Out of range queried mass peaks:
Replicated queried mass peaks: 67.1, 80.0, 93.1,
Processing time: 0:00:01.128278
Results for the quried mass "81.1"
| Formula | Mass differences | Num. used protons | Num. required extra protons | Atom names |
| C3O2N1 | 0.070 | 1 | 0 | C1,C5,C6,N7,O10,O11 |
| C5O1 | 0.008 | 5 | 1 | C1,C2,C4,C5,C6,O10 |
| C5O1 | 0.008 | 5 | 0 | C1,C2,C4,C5,C6,O11 |
| C4O1N1 | 0.027 | 3 | 0 | C1,C4,C5,C6,N7,O10 |
| C4O1N1 | 0.027 | 3 | 0 | C1,C4,C5,C6,N9,O10 |
| C4O1N1 | 0.027 | 3 | 0 | C1,C4,C5,C6,N7,O11 |
| C4O1N1 | 0.027 | 3 | 0 | C1,C4,C5,C6,N9,O11 |
| C5N1 | 0.016 | 7 | 2 | C1,C2,C3,C4,C5,N8 |
| C5N1 | 0.016 | 7 | 2 | C1,C3,C4,C5,C6,N9 |
| C5N1 | 0.016 | 7 | 1 | C1,C2,C3,C4,C5,N9 |
| C5N1 | 0.016 | 7 | 2 | C1,C2,C4,C5,C6,N9 |
| C5N1 | 0.016 | 7 | 1 | C1,C2,C4,C5,C6,N7 |
| C4N2 | 0.004 | 5 | 0 | C1,C2,C3,C4,N8,N9 |
| C4O2 | 0.051 | 1 | 0 | C1,C4,C5,C6,O10,O11 |