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Cell Biology

Selling Stem Cells to Voters
October 15, 2008
If you thought embryonic stem cell research became moot after researchers found they could induce skin cells to become pluripotent, these news stories show the push is still on to open up more funds for embryonic stem cells.  A ballot measure in Michigan is a bellwether for how scientists still feel about these tantalizing objects […]
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Amazing Facts

Deep Life Is Right at Home in Total Darkness
October 10, 2008
It seems every year scientists find organisms thriving in environments thought too inhospitable for life.  A new word was coined for these organisms: extremophiles – lovers of the extreme.  Two recent discoveries push the envelope of extreme environments almost to the deep limit. Pressurized fish:  The bottoms of the deep ocean trenches of the Pacific […]
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Amazing Facts

Cellular Machines Work Like Cameras, Winches and Turboprops
September 3, 2008
The discovery that cells are filled with molecular motors is one of the major achievements of late 20th-century molecular biology.  Biochemists routinely use the word “motor” when describing cellular processes, because, in fact, machines made of protein actually do use energy to perform work.  Now we have a new hybrid science – biophysics – that […]
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Amazing Facts

How Chromosomes Pack Without Exploding
August 24, 2008
When preparing to divide, a cell has to copy all its DNA accurately and pack it into chromosomes.  A professor at U Chicago told Science Daily this is “like compacting your entire wardrobe into a shoebox.”  The cell has another difficulty in this compaction process, though: DNA, being negatively charged, resists packing.     Eukaryotes […]
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Amazing Facts

Membrane Switches Keep Your Brain Humming
August 14, 2008
Tunnels with rotating gates and rocker switches – this sounds like mechanical engineering.  It’s the machinery that helps power your brain, reported scientists from UCLA and the Pasteur Institute.     Their paper in Science described the structure of just one of many kinds of membrane channels.1  Cell membranes are lined with elaborate one-way gates.  […]
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Cell Biology

Adult Stem Cells Race Ahead; Embryonics Falter
August 7, 2008
Major advances are being made with induced pluripotent stem cells (iPS), stem cells reconstituted from adult tissues, while interest in embryonic stem cells (ES) seems to be drying up.     Both Nature and Science reported advances in iPS technology last week.  Nature reported that the number of factors needed to reconstitute pluripotent stem cells […]
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Amazing Facts

Cellular Trucks Use Moving Highways
July 18, 2008
Imagine how cool it would be to get in your car and have the road do the driving.  The highway would stretch or shrink, moving this way or that, till you saw your destination and hopped off.  That appears to be what the cargo-bearing motors do in the cells in your body.  A new paper […]
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Amazing Facts

It’s Networks All the Way Down
July 8, 2008
New ways of seeing biology are finding life is full of networks.  At both ends of the complexity scale – from humans to bacteria – complex interactions are the rule.  Two teams studying different phenomena had the same reaction – astonishment. Bottom-up complexity:  Who would have thought one of the simplest life forms has a […]
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Amazing Facts

Amazing Cell Tricks: Contour Map Navigation
July 5, 2008
Watch a cell divide, and if things go well, it always divides in the middle.  How does a cell figure out where its middle is?  It follows its contour map.  PhysOrg titled its entry, “Dividing cells find their middle by following a protein ‘contour map’.”     Cell division, or cytokinesis, is a precisely-controlled operation […]
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Amazing Facts

Bacterial Flagellar Motor Has a Protein Clutch
June 24, 2008
The bacterial flagellum, the whiplike outboard motor that has become an icon of intelligent design, has another artificial-looking part: a clutch.  Science reported this in “machine language” as follows:1 The bacterial flagellum, powered by a motor that generates 1400 pN-nm of torque, can rotate at a frequency of greater than 100 Hz.  EpsE [the clutch […]
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Amazing Facts

Magic Box in the Cell Baffles the Experts
June 16, 2008
Put a string of amino acids into this magic box, and it comes out all precisely folded into a protein.  How does it do it?  A molecular machine described by Science Daily has scientists baffled.  Ironically, its name is TRiC.     TRiC is a chaperonin, a member of a class of molecular machines that […]
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Amazing Facts

Few Typos Get Past Your Spell Checker
June 11, 2008
Inside your cells are thousands of spell checkers that put any human typist to shame.  In a process critical to all living things, RNA Polymerase II transcribes DNA into RNA rapidly with high fidelity.  Even very similar chemical letters are accurately discriminated by this wonder of a molecular machine that is described in Science Daily. […]
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Cell Biology

Darwinism Demonstrated in the Lab
June 10, 2008
Lenski’s done it.  The champion of Avida, a computerized evolution demo (see Evolution News) has demonstrated Darwinian evolution with real live organisms.  His achievement announces his inauguration into the prestigious National Academy of Sciences.1     Lenski and team ran one of the longest-running evolution experiments ever with E. coli bacteria.  After more than 30,000 […]
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Amazing Facts

Cell Electronics Is High-Tech
May 13, 2008
To describe a living cell these days, you have to borrow electronics lingo.  Notice how two recent articles described cell specs: Ham radio immunity:  What acts like a radio dial, a signal amplifier, and a precision rheostat?  Your immune system, according to Science Daily.  Scientists at St. Jude Children’s Research Hospital described how the cell […]
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Cell Biology

Fitting Data to Darwinism Takes Creativity and Spin
May 6, 2008
Fairly regularly, papers appear in journals under the heading of Evolution.  The ones dealing with genetics tend to be hard to follow.  They are filled with jargon, correlation scores, charts and network diagrams.  They employ algorithms and databases unfamiliar to the lay reader.  Overall, though, they claim to find support for Darwin’s tree of life […]
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