R. BICK, B. POINDEXTER, UT MEDICAL SCHOOL / SCIENCE PHOTO LIBRARY R. BICK, B. POINDEXTER, UT MEDICAL SCHOOL / SCIENCE PHOTO LIBRARY
Keratinocyte skin cells, fluorescence deconvolution micrograph. Fluorescent dyes have been used to highlight tissues, cellular structures and proteins: f-actin (green), cell nuclei (pink), defensins (yellow and red). Actin is a protein that is a major part of a cell's cytoskeleton, and one of its forms is filamentous actin (f-actin). Defensins are proteins that help defend against pathogenic bacteria, fungi and viruses, and are commonly found in epithelial cells such as skin cells. Keratinocytes are the major type of skin cell, changing as they pass through the skin and eventually becoming dead keratinised cells at the skin's surface.
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