An Adapter Molecule; tRNA. DnaTube.com - Scientific Video and Animation Site. Detailed explanation of mRNA Translation. Transcription & Translation: Transcription (Advanced) Transcription & Translation: Transcription (Advanced) Transcription is the process by which the information in DNA is copied into messenger RNA (mRNA) for protein production. Transcription begins with a bundle of factors assembling at the promoter sequence on the DNA (in red). Here, two transcription factors are already bound to the promoter. Other proteins arrive, carrying the enzyme RNA polymerase (in blue). To initiate transcription, these assembled proteins require contact with activator proteins that bind to specific sequences of DNA known as enhancer regions.
Once the contact is made, the RNA polymerase races along the DNA to transcribe the gene. Duration: 1 minutes, 53 seconds Transcript: The Central Dogma of Molecular Biology: "DNA makes RNA makes protein" Here the process begins. Choose a 3-D animation by name: Under the Microscope #6 -- Killer T-cells. In this video we see a killer T-cell of the immune system attacking a cancer cell. Under the Microscope is a collection of videos that show glimpses of the natural and man-made world in stunning close-up.
They are released every Monday and Thursday for the next few weeks and you can see them here: bit.ly/A6bwCE Professor Gillian Griffiths said: “Cells of the immune system protect the body against pathogens. If cells in our bodies are infected by viruses, or become cancerous, then killer cells of the immune system identify and destroy the affected cells. Cytotoxic T-cells are just 10 microns in length: approximately one-tenth the width of a human hair. The original footage shown was made by Alex Ritter, a PhD student on the NIH-OxCam program, in the laboratory of Professor Gillian Griffiths at the Cambridge Institute for Medical Research and the Department of Medicine of the Clinical School of the University of Cambridge.
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