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 |
| PTPRC | 1q31.3-q32.1 | 151460 | A, S | {Hepatitis C virus, susceptibility to}, 609532 (3) | 609532 | 3 |
| PTPRC | 1q31.3-q32.1 | 151460 | A, S | Severe combined immunodeficiency, T cell-negative, B-cell/natural killer-cell positive, 608971 (3) | 608971 | 3 |