This IgY fraction antibody of anti-Human macrophage migration inhibitory factor (MIF) has been tested for use in ELISA and immunoblotting. Although not tested, this antibody may also be useful for neutralization assays, immunohistochemistry and flow cytometry. The antibody recognizes 12,300 MW mature human MIF. The MIF gene encodes a protein of 115 aa. The initiating methionine is cleaved leaving a mature protein of 114 aa. Reactivity in other immunoassays is unknown.