1 => Disorder placed on map based on association with a gene; defect unknown
2 => Disorder placed by linkage; no mutation found
3 => Molecular basis known; mutation found in gene
4 => Contiguous gene deletion/duplication syndrome
| Gene Symbol | Chromosomal Location | Gene MIM number | Mapping Method | Phenotype | Phenotype MIM number | Phenotype Mapping Key |
| PGP | 16p13.3 | 172280 | S, F, Fd | NA | NA | NA |
| PGP | 19p13.11 | 610694 | REc | NA | NA | NA |