| µg | Microgravity |
| PTM(s) | Posttranslational modification(s) |
| RPM | Random Positioning Machine |
| LfQ | label free quantitation |
| SKB | Semantic Knowledge Base |
| 2D | Two-dimensional |
| 3D | Three-dimensional |
| KE | Knowledge Explorer |
| RDF | Resource Description Framework |
| RPM | Random positioning machine |
| SPARQL | Semantic Protocol and RDF Query Language |