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Human Dna And Nucleus, Tem
Dr Gopal Murti
Photograph - Photograph
Human DNA and nucleus. Coloured transmission electron micrograph (TEM) of human DNA (deoxyribonucleic acid, strands) superimposed on a confocal light micrograph of a mammalian nucleus (bright blue and pink). The DNA seen here is in its uncondensed form and measures several metres in length. However, a mammalian cell nucleus, which holds a cell's DNA, only measures between 0. 02 and 0.01 millimetres in diameter. To fit into the nucleus the DNA is first coiled around proteins (called histones) to form a complex known as a nucleosome. The nucleosomes then further coil and condense to form chromatin, the DNA-protein complex that makes up chromosomes. Magnification x20,000 when printed at 10 centimetres tall.
May 6th, 2013
Viewed 170 Times - Last Visitor from Kiev, 13 - Ukraine on 08/16/2014 at 8:45 PM
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