| F()R:Ag | factor ( ) related antigen |
|---|---|
| F()R:C | factor ( ) related cofactor activity |
| F(ab')2 | fragment, antigen-binding [of immunoglobulins] |
| F+ | a bacterial cell having an F plasmid |
| 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 |