Acknowledgements xi 1. Recent Trends in the Wool Industry and Some Long-Term Policy Issues 1 R. Richardson STRUCTURE AND FUNCTION OF THE HAIR FOLLICLE 2. Morphogenesis of the Hair Follicle during the Ontogeny of Human Skin 15 KA. Holbrook, C. Fisher, BA. Dale and R. Hartley 3. Specific Keratins and their Associated Proteins as Markers for Hair Follicle Differentiation 37 W. M O'Guin, D. Dhouailly, M. Manabe and T. -T. Sun 4. The Dermal Papilla and Maintenance of Hair Growth 51 R. F. Oliver and CA. B. lahoda 5. Special Biochemical Features of the Hair Follicle 69 G. E. Rogers, E. S. Kuczek, P. J. MacKinnon, R. B. Presland and M. J. Fietz KERATIN PROlEINS 6. Intermediate Filaments: Problems and Perspectives 87 R. D. Goldman and G. N. Dessev 7. Intermediate Filament Associated Protein of Epidermis 97 BA. Dale, KA. Resing, P. V. Haydock, P. Fieckman, C. Fisher and KA. Holbrook 8. Variations in the Proteins of Wool and Hair 117 R. C. Marshall and I. M. Gillespie 9. Protein Chains in Wool and Epidermal Keratin IF: Structural Features and Spatial Arrangement 127 J. F. Conway, R. D. B. Fraser, T. P. MacRae and DA. D. Pany 145 10. Amino Acid Sequences of Wool Keratin IF Proteins L. G. Sparrow, L. M. Dowling, V. Y. Loke and P. M. Strike 11. Structural Features of Keratin Intermediate Filaments 157 P. M. Steinert, D. R. Torchia and J. W.