The gene encodes the receptor of the epidermal growth factor. Mutations can be found in nonsmall cell lung cancer and appear to influence responsiveness to tyrosine kinase inhibitors. A role in regulation of the magnesium channel TRPM6 has also been demonstrated, so it influences magnesium homeostasis.
| 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 |
| Research | Method | Multiplex Ligation-Dependent Probe Amplification |
| Turnaround | 25 days | |
| Specimen type | genomic DNA |