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This is cool:Nobel laureate James Watson – co-discoverer of the DNA double helix and father of the Human Genome Project – today, in a presentation at Baylor College of Medicine, became the first human to receive the data that encompass his personal genome sequence.It's astonishing how far we've come in genetics in such a short time.(Via
Medgadget.)ADDENDUM:
FuturePundit has more on why this is significant.
Posted by Edward Willett at 5:24, June 3rd, 2007 under Blog |
This is pretty amazing:A pocket-sized device that runs on two AA batteries and copies DNA as accurately as expensive lab equipment has been developed by researchers in the US. The device has no moving parts and costs just $10 to make. It runs polymerase chain reactions (PCRs), to generate billions of identical copies of a DNA strand, in as little as 20 minutes. This is much faster than the machines currently in use, which take several hours.Copying DNA is important for a number of medical tests, such as diagnosing tuberculosis. The hope is that devices like this may make high-tech medicine more readily available in developing countries.Maybe it'll bring down medical ...
Posted by Edward Willett at 22:49, May 1st, 2007 under Blog |
...is about to get
a lot easier to create:Installing one of those prefab, snap-together wood-flooring kits is a lot easier than shaping and sanding rough planks. Adapting a similar construction strategy, a biotech startup called Codon Devices, based in Cambridge, MA, aims to streamline genetic engineering. It makes made-to-order DNA strands, freeing scientists from the finicky work it takes to put together a complicated piece of DNA the old-fashioned way.That capability could soon change the face of molecular biology. As it becomes cheaper and cheaper to create large chunks of genetic material from scratch, scientists will be able to make ever more complex biological creations. "In the next few years, we'll probably see people engineering ...
Posted by Edward Willett at 15:26, April 9th, 2007 under Blog |
...
when you've got DNA?Japanese scientists say it might be possible to use DNA to store text, images, music and other digital data for thousands of years inside living organisms.Masaru Tomita and colleagues at Tokyo's Keio University say data encoded in an organism's DNA, and inherited by each new generation, could be safely archived for hundreds of thousands of years, becoming the perfect storage medium. In contrast, CD-ROMs, flash memory and hard disk drives can easily fall victim to accidents or natural disasters.The researchers describe a method for copying and pasting data, encoded as artificial DNA, into the genome of Bacillus subtilis, a common soil bacterium, "thus acquiring versatile data storage and the robustness ...
Posted by Edward Willett at 14:49, February 16th, 2007 under Blog |
One place science and society frequently interact is within the courtroom. Seldom has that interaction been more dramatic than in the past few days, with the exoneration of Guy Paul Morin, who had served 18 months in jail for a murder he didn't commit, and with the start of the murder trial of a certain well-known ex-football-player. In both instances, a relatively new technology called DNA fingerprinting has been in the limelight.
DNA, deoxyribonucleic acid, is the complex substance that contains all the genetic information that makes us, not only human, but distinct individuals. It exists in the nucleus of almost every human cell as a huge, coiled molecule that, fully stretched out, ...
Posted by Edward Willett at 16:31, February 7th, 1995 under Blog, Columns, Science Columns |
"She's got her father's eyes." "He's got his mother's nose." From the moment a baby is born, expect children to look like their parents. But how does it happen?
An Austrian monk named Gregor Mendel took the first step toward our modern understanding of heredity in 1866, when he published a theory of inheritance based on his experiments with pea plants.
Mendel studied seven characteristics. For example, he crossed a tall strain of pea plants with a short strain. The first generation of crossbred plants were all tall. When he bred those plants together, though, three quarters of the offspring were tall and one quarter were short....
Posted by Edward Willett at 11:13, February 28th, 1994 under Blog, Columns, Science Columns |
I've written before about the genetic code and how it writes a description of each of us using an alphabet of only four letters: the four bases that are contained in deoxyribonucleic acid (DNA), adenine (A), guanine (G), cytosine (C) and thymine (T).
Every organism has different proportions of these four bases. Two strands of DNA run parallel to each other, but in opposite directions, forming the famous "double helix." In the centre of the molecule, weak chemical interactions between the bases hold the strands together. Adenine (A) always forms bonds with thymine (T), while cytosine (C) always binds with guanine (G). The sugar and phosphates that are also part of DNA form ...
Posted by Edward Willett at 4:44, May 5th, 1992 under Blog, Columns, Science Columns |
Our 26-letter alphabet often seems like a model of efficiency. Look at how much information can be encoded and passed on with it. Look at what Shakespeare accomplished with it. I'm particularly fond of it because my ability to manipulate it is what pays for my food and lodging and other necessities like new CDs.
But there is another alphabet that makes the English one of 26 letters look grossly overstocked. With just four letters, it manages to encode and transmit all the information necessary to create a living creature, from the lowliest bacteria to the mighty blue whale to us.
That's the alphabet of the genetic code, and its ...
Posted by Edward Willett at 16:24, November 6th, 1991 under Blog, Columns, Science Columns |