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Cell Lab
Cell Lab

... 2. Place the leaf in a drop of water in the center of a slide, cover with a cover slip, and observe under low, intermediate, and high power. 3. Under high power magnification, as the slide begins to warm up, you will see the chloroplasts and cytoplasm begin to move or stream inside the cell. This st ...
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... involved in colour loss mechanisms will be identified. Candidate genes will be identified through bioinformatic data mining using the Capsicum genome sequence. We hypothesise that candidate genes may include carotenoid cleavage dioxygenases, or genes involved in carotenoid sequestration and storage. ...
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Poster Thomas Sutherland DMMI - Workspace

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Chromatophore



Chromatophores are pigment-containing and light-reflecting cells, or groups of cells, found in bacteria and a wide range of animals including amphibians, fish, reptiles, crustaceans and cephalopods. Mammals and birds, in contrast, have a class of cells called melanocytes for coloration.Chromatophores are largely responsible for generating skin and eye colour in cold-blooded animals and are generated in the neural crest during embryonic development. Mature chromatophores are grouped into subclasses based on their colour (more properly ""hue"") under white light: xanthophores (yellow), erythrophores (red), iridophores (reflective / iridescent), leucophores (white), melanophores (black/brown), and cyanophores (blue). The term chromatophore can also refer to coloured, membrane-associated vesicles found in some forms of photosynthetic bacteria.Some species can rapidly change colour through mechanisms that translocate pigment and reorient reflective plates within chromatophores. This process, often used as a type of camouflage, is called physiological colour change or metachrosis. Cephalopods such as the octopus have complex chromatophore organs controlled by muscles to achieve this, whereas vertebrates such as chameleons generate a similar effect by cell signalling. Such signals can be hormones or neurotransmitters and may be initiated by changes in mood, temperature, stress or visible changes in the local environment. Chromatophores are studied by scientists to understand human disease and as a tool in drug discovery.
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