| E* | lesion on the erythrocyte cell membrane at the site of complement fixation |
|---|---|
| FMR | fragile site mental retardation [syndrome]; Friend-Moloney-Rauscher [antigen] |
| fra | fragil [site] |
| FRAXE | X-linked mental retardation-fragile site [syndrome] |
| HBVS | hepatitis B virus integration site |