B-DNA and A-DNA

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    • August 25, 2014 at 10:06 am #17887
      Sue4
      Participant

      What does B in B-DNA stand for? And A in A-DNA? I couldn’t find any answer by searching.I’m thankful if you can explain it to me. Thank you
      😯

    • August 25, 2014 at 6:49 pm #115380
      JackBean
      Participant

      I think it’s just A as the first discovered and B as the next.

    • August 26, 2014 at 3:27 am #115387
      Sue4
      Participant

      Thank you.. But B-DNA is the normal Watson Crick double helix form of DNA isn’t it? So it should be the one discovered first right?

    • August 26, 2014 at 6:54 pm #115388
      JackBean
      Participant

      I don’t know, but here http://en.wikipedia.org/wiki/DNA#Altern … structures it sounds to me that the A-DNA is rather present in crystalographic studies.
      Did they have it at such low resolution?

    • October 29, 2014 at 12:09 pm #115521
      noncentric
      Participant

      The "A" and "B" were arbitrary labels Rosie Franklin gave to the two types of DNA fibers she obtained under different conditions of salt concentration and relative humidity. She thought the A form was a potentially more interesting structure and wavered back and forth as to whether or not the A-form was helical, like the B-form clearly was. Franklin never received enough credit for her contributions.

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