Inactivating mutations of the GCM2 gene, a transcription factor, result in autosomal recessive hypoparathyroidism while activating mutations result in autosomal dominant familial isolated hyperparathyroidism.
| Research | 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 | 21 days | |
| Specimen type | genomic DNA |