Actin Collection

HeLa cells, light micrograph C017 / 8299
HeLa cells, multiphoton fluorescence micrograph (MFM). The cell nuclei, which contain the cells genetic information, are purple. Microtubules are blue and actin microfilaments are red

Cell structure. Confocal light micrograph of cultured endothelial cells. A fluorescent dye has been used to show the cell structure

HeLa cells, light micrograph C013 / 4774
HeLa cells. Multi-photon fluorescence light micrograph of a group of cultured HeLa cells, showing the cell nuclei, which contain the cells genetic information (DNA, red)

Immunofluorescent LM of fibroblast cell nuclei
Cell nuclei. Immunofluorescent light micrograph of cultured fibroblast cells showing nuclei with " nucleolar necklaces"

Intestinal microvilli, TEM
Intestinal microvilli, coloured transmission electron micrograph (TEM)

Heart muscle, confocal light micrograph
Heart muscle. Confocal light micrograph of a section through cardiac (heart) muscle

Structure Skeletal Muscle. myofibril with thin and thick filament. close up of a sarcomere. Muscles contract by sliding the myosin and actin filaments Structure Skeletal Muscle

Each skeletal muscle fiber has many bundles of myofilaments. Each bundle is called a myofibril

Muscle fibre structure, artwork
Muscle fibre. Computer artwork showing the structure of a muscle cell, also known as a muscle fibre. The cell is surrounded by a plasma membrane called the sarcolemma (cream)

Smooth muscle tissue, TEM
Smooth muscle tissue. Transmission electron micrograph (TEM) of a longitudinal section through smooth muscle cells

Illustration of muscle contraction

Detail of deep back muscles with a close-up of sprain, strain and spasm

Illustration of muscle contraction (with labels)

Neurofibromatosis, a genetic disorder of the nervous system
A genetic disorder of the nervous system, neurofibromatosis causes tumors to form on nerves throughout the body

Torn muscle fibers with healing stages surrounding. 1. Macrophage clean-up. 2. New cells migrate to repair. 3. Cells differentiate to become muscle cells

Embryonic smooth muscle cell C018 / 8595
Embryonic smooth muscle cell, immunofluorescence micrograph. Actin filaments are green, the protein vinculin is light blue. Actin is part of the cytoskeleton

Beta-actin molecule F006 / 9358
Beta-actin. Molecular model of the cytoskeletal protein beta-actin bound to profilin

DNase I complex, molecular model F006 / 9239
DNase I complex. Molecular model of deoxyribonuclease I complexed with actin

Actin Myosin Muscle Model, artwork C014 / 2661
Computer artwork of the molecular actin myosin muscle structure

Muscle contraction proteins. Molecular model of muscle protein motor cross-bridges during contraction in muscle. The cross-bridge is seen from the side, with contraction taking place horizontally

Neuromuscular junction, artwork
Neuromuscular junction. Computer artwork showing the juntion between a neuron (nerve cell, light blue) and a muscle cell, known as a neuromuscular junction

Actin Myosin Muscle Model, artwork C014 / 2658
Computer artwork of the molecular actin myosin muscle structure

Actin Myosin Muscle Model, artwork C014 / 2659
Computer artwork of the molecular actin myosin muscle structure

Actin myosin muscle model, artwork C014 / 2660
Computer artwork of the molecular actin myosin muscle structure

Human muscle fibres, diagram
Human muscle fibres. Diagram showing the structure of human muscles from the cellular to the macroscopic level

Kidney tissue, fluorescence micrograph C016 / 8484
Kidney tissue. Fluorescence deconvolution micrograph of a section through a kidney, showing glomeruli (green), cell nuclei (blue dots), and renal tubules (red, circular)

Heart muscle, fluorescence micrograph C016 / 8483
Heart muscle. Fluorescence deconvolution micrograph of a section through heart tissue, showing the angular distribution of the myocardium (cardiac muscle) fibres (green)

Heart muscle, fluorescence micrograph C016 / 8481
Heart muscle. Fluorescence deconvolution micrograph of a section through heart tissue, showing blood vessels (oval, centre-left and upper centre) running through the myocardium (cardiac muscle)

Heart muscle, fluorescence micrograph C016 / 8478
Heart muscle. Fluorescence deconvolution micrograph of a section through heart tissue, showing a blood vessel (diagonal, centre) running through the myocardium (cardiac muscle, green)

Heart muscle, fluorescence micrograph C016 / 8477
Heart muscle. Fluorescence deconvolution micrograph of a section through heart tissue, showing a blood vessel (blue, diagonal, centre) running through the myocardium (cardiac muscle, green)

Adrenal gland, fluorescence micrograph C016 / 8472
Adrenal gland. Fluorescence deconvolution micrograph of a section through an adrenal gland, showing the zona glomerulosa and zona fasciculata

Fibroblast cell, fluorescent micrograph
Fibroblast cell. Confocal laser scanning micrograph of a fibroblast cell. The cell nucleus, which contains the cells genetic information, is green

HeLa cells, light micrograph C013 / 4773
HeLa cells. Multi-photon fluorescence light micrograph of a group of cultured HeLa cells, showing the cell nuclei, which contain the cells genetic information (DNA, blue), and microtubules (pink)

Dividing cell, light micrograph
Cell division. Fluorescent light micrograph of a cell that has divided by mitosis, the asexual replication of a cell into two new cells

Fibroblast cells, light micrograph
Fibroblast cells. Confocal light micrograph of human fibroblast cells. The cell nuclei, which contain the cells genetic information, are red

Rat tongue, light micrograph
Rat tongue. Confocal light micrograph of an en face section through a rats tongue, showing tastebuds. Actin protein filaments, which make up part of the cytoskeleton, are orange

Retina blood vessel and nerve cells
Retina cells. Fluorescent light micrograph of cells in the retina, the light-sensitive membrane that lines the back of the eyeball

Skeletal muscle fibre. Coloured scanning electron micrograph (SEM) of skeletal muscle fibre. This type of muscle is striated

Skeletal muscle, TEM
Skeletal muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through skeletal, or striated, muscle

Nerve cell growth. Fluorescent light micrograph of a PC12 cell following stimulation by nerve growth factor. The cell body contains the nucleus (green)

Muscle fibres. Computer-enhanced confocal light micrograph of skeletal (striated) muscle fibres. Skeletal muscle is under the conscious control of the brain

Artwork showing structure of human skeletal muscle
Skeletal muscle. Illustration of the structure of human skeletal muscle. Skeletal muscle (top right) consists of bundles of long, thin cells called muscle fibres

Cultured cell, light micrograph
Cultured cell. Immunofluorescent light micrograph of an epithelial cell (round, upper right). The cell proteins are marked by fluorescent dyes

Human epithelial cells. Fluorescent light micrograph of human epithelial cells in culture. The nuclei, which contain the cells genetic information DNA (deoxyribonucleic acid), have been dyed blue

Muscle cell anatomy, artwork
Muscle cell anatomy. Artwork of the anatomy of a muscle cell, also known as a muscle fibre. The cell is surrounded by a plasma membrane called the sarcolemma (grey)

Muscle structure, artwork
Muscle structure. Computer artwork showing the protein structure of myofibrils and how they are bound together to form muscle fibres

Cytoskeleton components, artwork. Three main components of the cytoskeleton, the internal support structure of a cell, are shown here

Cytoskeleton components, diagram. The cytoskeleton is the internal support structure of a cell, composed of filaments of various diameters in nanometres (nm)

Kidney cells, light micrograph
Kidney cells. Quantum dot fluorescence micrograph of a section through kidney tissue showing its cells

Cytoskeleton, TEM
Cytoskeleton. Coloured transmission electron micrograph (TEM) of the cytoskeleton of a human skin cell. The cell nucleus is at centre right

Cytoskeleton, SEM
Cytoskeleton. Coloured scanning electron micrograph (SEM) of the cytoskeleton of a human skin cell. The cell nucleus is oval. The rest of the cells contents have been biochemically extracted

Muscle anatomy. Cutaway artwork showing the anatomy and internal structure of a muscle, from the macroscopic (left) to the microscopic (right) level

Movement of Listeria bacteria
Movement of Listeria sp. bacteria. Immunofluorescence deconvolution micrograph showing the comet-like tails that help to propel Listeria sp. bacteria from cell to cell during an infection

Vaccinia virus infected cell. Immunofluorescence deconvolution micrograph of a cell infected with vaccinia virus particles. Host and viral DNA (deoxyribonucleic acid) is blue

E. coli infection mechanism. Immunofluorescence deconvolution micrograph of Escherichia coli bacteria (centre). Bacterial DNA (deoxyribonucleic acid) is blue

Fibroblast cells, fluorescent micrograph
Fibroblast cells. Immunofluorescence deconvolution micrograph of fibroblast cells. The cell nuclei, which contain the cells genetic information, are blue

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EDITORS COMMENTS

"Actin: The Dynamic Force Behind Cell Structure and Muscle Contraction" From HeLa cells to muscle fibers, actin plays a crucial role in various biological processes. This light micrograph C017 / 8299 showcases the intricate cell structure where actin filaments are prominently visible. In an immunofluorescent LM of fibroblast cell nuclei, actin's presence highlights its involvement in cellular movement and shape maintenance. Zooming into the intestinal microvilli through TEM reveals how actin filaments support their finger-like projections, aiding in nutrient absorption. Similarly, a confocal light micrograph of heart muscle unveils the organized arrangement and myosin filaments responsible for cardiac contractions. Stepping away from biology momentarily, we find ourselves at the 1973 24 Hours of Le Mans race. While seemingly unrelated, this event marked a breakthrough as researchers discovered similarities between car engines' pistons and muscle fiber structures - both relying on actin-myosin interactions for efficient performance. Returning to human anatomy, an artwork beautifully illustrates DTM (deep transverse massage) targeting deep back muscles affected by sprain, strain, or spasm. Actively engaging these muscles requires understanding their structure intimately. Delving deeper into muscle contraction mechanisms with labeled illustrations enlightens us about how actomyosin cross-bridges form during this process. Actins' ability to bind with myosins initiates muscular force generation necessary for any physical activity. Whether it's supporting cellular architecture or powering our movements during sports events like Le Mans or everyday activities like walking upstairs – "actin" remains an essential player behind the scenes.