Talk:DNA computing
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The information given for dna computing is far too less, especially when u compare with other articles on models of computing and and also on computational complexity theory. It would be proper if whoever is maintainig this page also gives more info on the various NP complete problems that have been solved by this form of parallel computing and their respective links.
Moved this para from the article, it doesn't make much sense as it written. Could the original author clarify this? --Lexor 10:44, 1 Feb 2004 (UTC)
- The DNA computing technology is related to the micro mechanical technology (that also use DNA for structural and mechanical constructions) (switches, gates, etc...).
There are two major aspects to "DNA computing". The first is for computation in the classical sense, that is for obtaining answers to problems, ala Adleman. The second is for construction of nano-scale assemblies. DNA can be used to create structures at the nanoscale. Researchers (Erik Winfree, Nadrian Seeman, John Reif, LaBean, Jonoska, many more) are investigating what structures can be built, and what things (such as carbon nanotubes) can be attached to the structures. Many possible uses for nano-electronics, nanoscale medical devices, and other nanodevices.
FYI -- Adleman solved the 7 vertex Hamiltonian Path Problem, not the Traveling Salesman Problem.
[edit] Computer made of poo?
http://en.wikipedia.org/w/index.php?title=DNA_computing&diff=10197883&oldid=10066215
I can't see any references elsewhere to imply the computer was made of feces, so can we remove this edit on the assumption it's a hoax?
[edit] DNA equivalent of bit?
Regular computers work on binary digits (bits). DNA-strand, however, has 4 different kinds of units, it's not a binary system. From 3, we have ternary and from 5 quinary, but what do you call a system with 4 digits? -130.232.66.34 12:29, 27 October 2005 (UTC)
Quaternary. M. Amos
[edit] Also, I don't think the calculation is right
1 gram of DNA ca 650g/mol base pairs 1.54 mmol * 6.02e23 /mol 9.26e20 bases In octets of bases, this is 9.26e20/8=1.16e20 octets In teraoctets, this is 1.16e20/1e12=1.16e8 teraoctets
If you say that a base is simply a bit, this is 1.16e8 terabytes, or 1.16e20 bytes, or 116 etabytes. If you say a base contains two bits of information* we have 232 etabytes.
- Say we say purines (A and G) are 1s, and pyrimidines (C and T) are 0s. An A contains the piece of information (A and NOT G), and so on. This is twice as much information.
- This only accounts for natural bases. Using Steven Benner's notation of puXXX and pyXXX for purine-like and pyrimidine-like bases with a three hydrogen-bond pattern, we have 2*2^3=16 possible three-hydrogen bond bases, and 8 possible two-hydrogen bond bases. Each of these bases potentially could contain twelve bits, yielding 1.392 zettabytes.
I often see this 750 terabyte number thrown around, and it's trash. If someone wants to wikify this text and incorporate it, it's empirically true, a reference would only be required for the "Benner notation" (not widely used as the term for it). A good reference is:
"Redesigning Nucleic Acids." Steven A. Benner, Thomas R. Battersby, Bernd Eschgfaller, Daniel Hutter, Janos T. Kodra, Stefan Lutz, Tuncer Arslan, Daniel K. Baschlin, Monika Blattler, Martin Egli, Christophe Hammer, Heike A. Held, Jennifer Horlacher, Zhen Huang, Birgitte Hyrup, Thomas F. Jenny, Simona C. Jurczyk, Marcel Konig, Ulrike von Krosigk, Michael J. Lutz, Lawrence J. MacPherson, Simon E. Moroney, Eugen Muller, Krishnan P. Nambiar, Joseph A. Piccirilli, Christopher Y. Switzer, Johannes J. Vogel, Clemens Richert, Andrew L. Roughton, Jiirgen Schmidt, K. Christian Schneider, and Joseph Stackhouse. Pure and Applied Chemistry. Vol 70, No. 2, p263-6 (1998).
24.181.29.106
[edit] Incorrect info
1st of all, i'm an Israeli junior-high student, and i am in a project called "Young researchers" that started the Weizmann institute, in that project me and my friend were chosen to research the "DNA computer" aka Bio-Computer and at some point of the research we were able to enter the Weizmann Bio Research lab and there we talked to Benny Gil, which is one of the original researchers that works very closely to Ehud Shapiro, although we were there only 2 times, we learnt loads of info, and i must say that at least half of whats written here is incorrect info, and i intend to write my own article about the bio computer myself.
- Go ahead, just provide references. --Carbonrodney 08:56, 13 February 2007 (UTC)
