| Fab | fragment, antigen-binding [of immunoglobulins] |
|---|---|
| F(ab')2 | fragment, antigen-binding [of immunoglobulins] |
| Fabc | fragment, antigen and complement binding [of immunoglobulins] |
| Facb | fragment, antigen, and complement binding |
| Fc | centroid frequency; fraction/centrifuge; fragment, crystallizable [of immunoglobulin] |