| Purine salvage pathway, adenine to AMP |
| APRT deficiency in purine salvage pathway |
| APRT deficiency in adenine metabolism |
| Purine salvage pathway, hypoxanthine/guanine to IMP/GMP |
| HPRT1 deficiency in purine salvage pathway |
| HPRT1 deficiency in hypoxanthine metabolism |
| HPRT1 deficiency in guanine metabolism |