| F- | a bacterial cell lacking an F plasmid |
|---|---|
| f-M | free metanephrine |
| F-met, | fMet formyl methionine |
| f-MLP | N-formyl-methyonyl-leucyl-phenylalanine |
| F-MuLV | Friend murine leukemia virus |
| F-N | finger to nose |
| f-NE | free norepinephrine |
| f-NM | free normetanephrine |
| F-SP | special form [Lat. forma specialis] |