International Review of Cytology presents current advances and comprehensive reviews in cell biology – both plant and animal. Authored by some of the foremost scientists in the field, each volume provides up-to-date information and directions for future research. This volume contains articles on Mechanism of Depolymerization and Severing of Actin Filaments and Its Significance in Cytoskeletal Dynamics; Biology of Polycomb and Thrithorax Group Proteins; Cell and Molecular Biology of Transthyretin and Thyroid Hormones; and Development and Role of Tight Junctions in the Retinal Pigment Epithelium.