An isolated clone consisting of sequences transcribed from the TNF-gamma gene. Also provided are human polypeptides translated from said TNF-gamma sequences and a procedure for producing such polypeptide by recombinant techniques. Also provided are a procedure for producing soluble biologically active TNF-gamma, which may be used to treat deficiencies of TNF-gamma and diseases conditions ameliorated by TNF-gamma. Antibodies, antagonists and inhibitors of such polypeptide which may be used to prevent the action of such polypeptide and therefore may be used therapeutically to treat TNF-gamma associated diseases, tumors or metastastases are disclosed. Also disclosed is the use of said antibodies, agonists and inhibitors as well as the nucleic acid sequences to screen for, diagnose, prognosticate, stage and monitor conditions and diseases attributable to TNF-gamma, especially inflammation. The use of said partial sequence to provide antibodies, agonists and inhibitors as well as partial nucleic acid sequences to screen for, diagnose, stage and monitor diseases associated with TNf-gamma, including but not limited to inflammation. Illustrative sequences and clone designations for TNF-gamma are provided.