Video 34: Douglas Hanahan, clip 3
Doug Hanahan is a professor of biochemistry at UCSF. He refined transformation techniques, and developed the current theories on the mechanisms of DNA uptake.
douglas hanahan, dna uptake, transformation techniques, pores, biochemistry, mechanisms
- ID: 16717
- Source: DNALC.DNAFTB
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Improving on the Mandel and Higa method of DNA transformation.
Size of DNA and transformation efficiencies.
The problem of getting DNA into a bacteria.
Definitions of "cloning."
Doug Hanahan refined transformation methods for DNA uptake into bacteria.
Stanley Cohen and Herbert Boyer transform bacteria with a recombinant plasmid, and Doug Hanahan studies induced transformation.
Stanley Cohen and Herbert Boyer inserted the recombinant DNA molecule they created into E. coli bacteria by means of a plasmid, thereby inducing the uptake and expression of a foreign DNA sequence known as "transformation."
Professor Douglas Hanahan discusses how cancer acquires capabilities and these capabilities are all, to some approximation, necessary to produce a successful tumor.
Professor Douglas Hanahan explains that a fundamental property of multi-cellular organisms is the capability to have cells commit suicide or undergo apoptosis, which is a form of programmed cell death.
Professor Douglas Hanahan, discusses that due to the nature of the replication machinery chromosomes get smaller every time they divide, and that we now appreciate that specialized cells in the body have a way to counteract this telomere shorting.