Processed databases
Atom-Mass pairs
Outputs for L-Leucine; LC-ESI-QQ; MS2; CE:50 V; [M+H]+
Database: Institute for Advanced Biosciences, Keio Univ.
Entry ID: KO003281
Synonyms: Leu, L-Leucine, 2-Amino-4-methylvaleric acid, (2S)-alpha-Leucine, (2S)-alpha-2-Amino-4-methylvaleric acid
Total mass: 131.1724
Formula: H13 C6 O2 N1
Experimental information
MS type: MS2
Instrument: API3000, Applied Biosystems
Instrument type: LC-ESI-QQ
Ionization mode: POSITIVE
CAMP general report:
Acceptable mass threshold: 2.0158Out of range queried mass peaks:
Replicated queried mass peaks: 40.9, 44.0, 55.3, 56.2,
Processing time: 0:00:00.842418
Results for the quried mass "54.4"
| Formula | Mass differences | Num. used protons | Num. required extra protons | Atom names |
| C2O1N1 | 0.372 | 0 | 0 | C5,C6,N7,O8 |
| C2O1N1 | 0.372 | 0 | 0 | C5,C6,N7,O9 |
| C2O2 | 0.396 | 2 | 0 | C5,C6,O8,O9 |
| C3N1 | 0.330 | 4 | 0 | C3,C4,C5,N7 |
| C3N1 | 0.330 | 4 | 0 | C3,C5,C6,N7 |
| C3O1 | 0.353 | 2 | 0 | C3,C5,C6,O8 |
| C3O1 | 0.353 | 2 | 0 | C3,C5,C6,O9 |
| C4 | 0.310 | 6 | 0 | C1,C3,C4,C5 |
| C4 | 0.310 | 6 | 0 | C2,C3,C4,C5 |