| IC Inferred by curator |
| IDA Inferred from direct assay |
| IEA Inferred from electronic annotation |
| IEP Inferred from expression pattern |
| IGC Inferred from genomic context |
| IGI Inferred from genetic interaction |
| IMP Inferred from mutant phenotype |
| IPI Inferred from physical interaction |
| ISA Inferred from sequence alignment |
| ISM Inferred from sequence model |
| ISO Inferred from sequence orthology |
| ISS Inferred from sequence or structural similarity |
| NAS Non-traceable Author Statement |
| ND No biological data available |
| RCA Reviewed computational analysis |
| TAS Traceable author statement |
| NR Not recorded (appears in some legacy annotations) |