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Biology > Introduction to Biology/nVideo Lectures - Lecture 21/nTopics covered: /nVirology/Tumor Viruses/nInstructor: /nProf. Robert A. Weinberg/nTranscript - Lecture 21/nGood morning class, nice to see you again. I trust you had a relaxing weekend and a Happy Halloween, whatever a Happy Halloween is. You recall that last time we were talking about the process of cell transformation, and recall,...
Added: 346 days ago From mitlectures | global.duration: 3020.60 | Views: 2730 | Comments: 0

Diversity of Life: Introduction to Viruses Christine Herrmann, PhD
Added: 1008 days ago From siere | global.duration: 0.08 | Views: 2737 | Comments: 0

Dr. Finlay and Dr. Richard Ganem use physical analogies to compare the size of bacteria and viruses to a standard mammalian cell. Also featured on the DVD 2000 and Beyond: Confronting the Microbe Menace, available free from HHMI.
Added: 954 days ago From siere | global.duration: 78.40 | Views: 2563 | Comments: 0

The cellular immune response As the fruit picking was going on, Brian heard someone shout, “Bless you!” after a fellow fruit-picker let out a loud sneeze. Unbeknownst to poor little Brian, some of the air he was breathing in the orchard was now laden with particles of the influenza virus. While the humoral immune response is underway, some of the influenza viral particles will have be...
Added: 918 days ago From tubeman | global.duration: 0.08 | Views: 10392 | Comments: 0

Subclones: Transcript The clone libraries were prepared using bacterial artificial chromosomes, or BACs. Each BAC clone contained 100,000 to 200,000 bases of DNA sequence. The large BAC clones were used to establish the order of the DNA sequences. To sequence the DNA, smaller-sized clones were needed. Project scientists cut the large BAC clones into smaller fragments of about 2,000 bases. These s...
Added: 926 days ago From sana | global.duration: 0.10 | Views: 2443 | Comments: 0

This video shows how rnai is discovered in very simpe way. www.hhmi.org Text info: RNA interference (also called "RNA-mediated interference", abbreviated RNAi) is a mechanism for RNA-guided regulation of gene expression in which double-stranded ribonucleic acid inhibits the expression of genes with complementary nucleotide sequences. Conserved in most eukaryotic organisms, the RNAi pathway is tho...
Added: 924 days ago From second | global.duration: 466.80 | Views: 7453 | Comments: 2

This video shows how rnai is discovered in very simpe way. www.hhmi.org Text info: RNA interference (also called "RNA-mediated interference", abbreviated RNAi) is a mechanism for RNA-guided regulation of gene expression in which double-stranded ribonucleic acid inhibits the expression of genes with complementary nucleotide sequences. Conserved in most eukaryotic organisms, the RNAi pathway is tho...
Added: 924 days ago From second | global.duration: 452.69 | Views: 4143 | Comments: 0

All cellular organisms — prokaryotic and eukaryotic — share basic chemical similarities. Out of these similarities, however, emerge diverse patterns of cell assembly. Students encounter the tools to understand various cell types and their relationship to nonc ell entities such as viruses.
Added: 917 days ago From tubeman | global.duration: 405.11 | Views: 1770 | Comments: 0

All cellular organisms — prokaryotic and eukaryotic — share basic chemical similarities. Out of these similarities, however, emerge diverse patterns of cell assembly. Students encounter the tools to understand various cell types and their relationship to non cell entities such as viruses.
Added: 917 days ago From tubeman | global.duration: 408.17 | Views: 1617 | Comments: 0

All cellular organisms — prokaryotic and eukaryotic — share basic chemical similarities. Out of these similarities, however, emerge diverse patterns of cell assembly. Students encounter the tools to understand various cell types and their relationship to non cell entities such as viruses.
Added: 917 days ago From tubeman | global.duration: 408.38 | Views: 1444 | Comments: 0

All cellular organisms — prokaryotic and eukaryotic — share basic chemical similarities. Out of these similarities, however, emerge diverse patterns of cell assembly. Students encounter the tools to understand various cell types and their relationship to non cell entities such as viruses.
Added: 917 days ago From tubeman | global.duration: 405.57 | Views: 1420 | Comments: 0

In molecular biology, Transformation is the genetic alteration of a cell resulting from the uptake and expression of foreign genetic material (DNA). Separate terms are used for genetic alterations resulting from introduction of DNA by plasmid-encoded conjugation or by viruses (transduction). Transformation of animal cells is usually called transfection. The term transformation is also used more...
Added: 915 days ago From second | global.duration: 508.76 | Views: 5434 | Comments: 0

This animation shows the spread of cancer via blood vessels. In this case, the final destination is guided by signaling molecules that bind to the migrating cells. In the example shown, the signaling molecules are SDF-1 and the receptor is CXCR4. This is thought to occur in breast cancer and some other cancer types. CXCR4, (a CXC chemokine Receptor), also called fusin, is an alpha-chemokine recept...
Added: 853 days ago From benchwork | global.duration: 81.40 | Views: 10166 | Comments: 1

Video shows HIV entrance to cell. The Human Immunodeficiency Virus (HIV) is the virus that leads to AIDS. HIV belongs to a subset of retroviruses called lentiviruses (or slow viruses), which means that there is an interval -- sometimes years -- between the initial infection and the onset of symptoms. Upon entering the bloodstream -- through mucous membranes or blood-to-blood contact -- HIV infects...
Added: 831 days ago From nirva | global.duration: 73.91 | Views: 4623 | Comments: 0