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← Genetic Code

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Showing Revision 1 created 09/29/2013 by Cogi-Admin.

  1. Although George Gamow thought information would be stored
  2. most efficiently in the overlapping model. In reality
  3. the triplet code is read in the non-overlapping
  4. fashion. Actually, the less efficient method. Now, obviously, if
  5. we were designing a system, this doesn't make
  6. a lot of sense, as far as efficiency's sake,
  7. right? We can get more information stored in
  8. this overlapping model than compared this non overlapping model
  9. where each codon has to be its own individual or its own discreet unit. And
  10. it turns out that this messiness, this
  11. inefficiency is a result of evolution. And in
  12. particularly some molecular constraints of the system
  13. that are slightly beyond the scope of our
  14. material here. So that means that we're left
  15. with 64 possible combinations of three nucleotides and
  16. each set of three is referred to as a
  17. codon. So we have 64 possible codons. And a codon
  18. is just a sequence of the three nucleotides that
  19. are part of the genetic code. And, it took years
  20. of experiments to finally determine which codons code for
  21. which amino acids. And this information is referred to as
  22. the genetic code. Although it took many years and a
  23. lot of hard work to come up with this information.
  24. I'm giving it to you, right here, summarized for free in
  25. less than a few seconds. Here is all of the magic of
  26. the genetic code. You'll going to have to get quite familiar with
  27. this table so, I hope it doesn't scare you away too fast.
  28. I've color coded it to try to make it a little
  29. simpler for you. And I'll explain to you how to read it
  30. in just a moment. But the first thing that I want
  31. you to do is actually just stare at it for a minute.
  32. Try to read it. First letter in the
  33. codon, second letter in the codon, third letter in
  34. the codon. We have UCAG, UCAG, and then
  35. each combination for every row here. And then you
  36. can see each codon is spelled out. In
  37. the individual box and then beside it is the
  38. amino acid that it codes for. What patterns or
  39. features stand out to you about this genetic code?
  40. Is there anything interesting that you notice? I
  41. want you to use the text box here
  42. to describe any kind of response you have
  43. that might answer this question. And don't worry about
  44. getting this right or wrong. I just want to see what you pick up on. You
  45. could always go to the forum and see
  46. what other people think about the genetic code too.