The gene INSR encodes the insulin receptor, which is responsible for insulin's inreacellular metabolic actions. Depending on the nature of the mutation different diseases ensue. Insulin resitance is autosomal dominant, while Donohue syndrome (Leprechaunism) and Rabson-Mendenhall syndrome are autosomal recessive.
| Clinic | Method | Carrier testing |
| Turnaround | 5 days | |
| Specimen type | genomic DNA |
| Clinic | Method | Massive parallel sequencing |
| Turnaround | 25 days | |
| Specimen type | genomic DNA |
| Clinic | Method | Genomic sequencing of the entire coding region |
| Turnaround | 25 days | |
| Specimen type | genomic DNA |