Table of Contents Characteristics of AP-1 Subunits Jun Family, Angel and Herrlich FOS Family, Schuermann Regulation of AP-1 Activity and Synthesis Protein/Protein Interactions: Factors Modulating AP-1 Activity, Sassone-Corsi Steroid Hormone Receptors/AP-1, Cato Post-Translational Modification: Jun Modification, Sachsenmaier and Radler-Pohl FOS Modification, Shaw Nuclear Uptake, Jeanteur Promoter Regulation: C-FOS, Nordheim C-Jun, Mechta and Yaniv Functions in Physiological Processe AP-1 Regulated Target Genes, Busslinger Neural Cell Function, Sassone-Corsi Differentiation, Rather Stress Response, Rahmsdorf Functions in Pathology FOS and Jun Oncogenes: FOS in Transformation, Miller Jun in Transformation, Vogt Oncogenes Acting through FOS and Jun: Raf Kinase, Rapp Other Oncogenes, Schanthal Adenovirus E1A/AP-1 Connection, van Dam and van der Eb Tumor Promotion and Carcinogenesis, Yuspa Tumor Progression, Hart