Processed databases
Atom-Mass pairs
Outputs for Purine; LC-ESI-QQ; MS2; CE:30 V; [M+H]+
Database: Institute for Advanced Biosciences, Keio Univ.
Entry ID: KO003750
Synonyms: Purine
Total mass: 120.1119
Formula: H4 C5 N4
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: 169.0,
Replicated queried mass peaks: 62.6, 68.9, 120.1,
Processing time: 0:00:01.609773
Results for the quried mass "76.9"
| Formula | Mass differences | Num. used protons | Num. required extra protons | Atom names |
| C4N2 | 0.164 | 1 | 0 | C1,C3,C4,C5,N7,N9 |
| C4N2 | 0.164 | 1 | 0 | C1,C2,C4,C5,N6,N8 |
| C4N2 | 0.164 | 1 | 0 | C1,C2,C3,C4,N6,N7 |
| C3N3 | 0.144 | 1 | 0 | C3,C4,C5,N7,N8,N9 |
| C3N3 | 0.144 | 1 | 0 | C2,C3,C5,N6,N8,N9 |
| C3N3 | 0.144 | 1 | 0 | C2,C3,C5,N7,N8,N9 |
| C3N3 | 0.144 | 1 | 0 | C1,C3,C4,N6,N7,N9 |
| C3N3 | 0.144 | 1 | 0 | C1,C2,C5,N6,N8,N9 |
| C3N3 | 0.144 | 1 | 0 | C1,C2,C4,N6,N7,N8 |