1 => The disorder is placed on the map based on its association with a gene, but the underlying defect is not known
2 => The disorder has been placed on the map by linkage; no mutation has been found
3 => The molecular basis for the disorder is known; a mutation has been found in the gene
4 => A contiguous gene deletion or duplication syndrome, multiple genes are deleted or duplicated causing the phenotype
| Gene Symbol | Chromosomal Location | Gene MIM number | Mapping Method | Phenotype | Phenotype MIM number | Phenotype Mapping Key |
| FCGR2A | 1q23.3 | 146790 | REb, REn, Fd, RE | {Lupus nephritis, susceptibility to}, 152700 (3) | 152700 | 3 |
| FCGR2A | 1q23.3 | 146790 | REb, REn, Fd, RE | {Malaria, severe, susceptibility to}, 611162 (3) | 611162 | 3 |
| FCGR2A | 1q23.3 | 146790 | REb, REn, Fd, RE | {Pseudomonas aeruginosa, susceptibility to chronic infection by, in cystic fibrosis}, 219700 (3) | 219700 | 3 |