I. A. BERNSTEIN is Professor in the School of Public Health and is Professor in the Department of Biological Chemistry, at the University of Michigan and the University of Michigan Medical School, respectively.T. HIRONE is Professor and Chairman of the Department of Dermatology at Kanazawa University.

• Preface DNA Flow Cytometry of Normal Human Epidermis: Age and Regional Variations Biochemical Aspects of Nucleotides in Normal and Hyperkeratotic Epidermis: Nucleoside Phosphate Kinase and DNA Polymerase Coonditions for Formation of Hemidesmosomes in Vitro The Biological Significance of Fatty Acid Turnover in Keratinocyte Proliferation and Differentiation Membrane Differentiation in Human Keratinocytes: Ultrastructural Studies by Using Conventional and Label-Freeze-Fracturing Analysis of Epidermal, Nail and Hair Low-Sulfur Keratins by Electrophoresis and Proteinase Degradtion An Abnormal Cystine-Rich Granule Formation in Palmoplantar Keratoderma Epidermis Structural Implications of the Primary Sequences of Keratin and Other Intermediate Filaments Possible Involvement of Limbal Cells in Corneal Epithelial Differentiation: A Unifying Model Use of Filaggrin as a Model Substrate for Epidermal Kinases and Phosphatases The Role of Skin Sulfhydryl Oxidase in the Keratinization Process-Localization and Activation Mechanisms Monoclonal Antibody Detection of Nuclear Proteins Involved in Granular Cell Protein Synthesis Comparative Analysis of Cutaneous DNA Repair In Vivo and In VITRO Epidermal Growth Factor (EGF) Regulates Non-Mitogenic Functions of Differentiated Mammalian Tissues Fine Structural Study of Keratinocytes in Human Epidermis Using Cryomicrotomy and Negative Staining Epidermal Adenylate Cyclase System: Modification of Beta-Adrenergic Response by Glucocorticoids Oncogenic Properties of Human Keratinocytes Transormed by SV40 Expression of Basement Membrane Zone Antigens by Transplantable Acantholytic Squamous Cell Carcinoma Cytoskeleton of Cultured Human Epidermal Keratinocytes: Immunoflorescence Studies of Keratin and Actin and Alteration by Oncogenic Virus and Ca2+ Biological Significance of Lipid Peroxidation in Puva Epidermis: A Site of Drug Metabolism Environmental Modification of Epidermal Differentiation Index