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help.. biochemistry

Discussion in 'Physician Scientists' started by natusss, Apr 22, 2007.

  1. natusss

    natusss Member 7+ Year Member

    224
    2
    Jun 18, 2006
    does anyone know the purpose of Triton/acid urea gels? I am trying to find something that describes the theory behind it and how histones would run in such a gel, but I cannot find it anywhere. :(
    Thanks
    Natusss
     
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  3. totalcommand

    totalcommand Senior Member 5+ Year Member

    202
    1
    Jul 26, 2005
    I think the acid allows you to separate based on charge (protonating aa side groups), the urea allows you to separate based on size (denaturing the protein), and Triton allows you to separate based on hydrophobicity.

    Don't know much about histones though.

    edit:

    "The Triton X-100 horizontal gradient system demonstrates
    unequivocally the inability of the acid/urea gel system used
    in earlier studies to resolve sperm histones. We suspect the
    H2A, H2B, and H3 variants present in human sperm simply
    have similar mobilities in the acid-urea gel system although
    some type of complexation between the histones is a possibility.
    The inclusion of Triton in the acid-urea gel readily
    resolves the histones based on their varying hydrophobicity."

    http://www.jbc.org/cgi/reprint/265/33/20662.pdf

    good luck.

    http://sbs.umkc.edu/waterborg/chromat/chroma17.html
     
  4. natusss

    natusss Member 7+ Year Member

    224
    2
    Jun 18, 2006
    thanks for your help
    I have to write a page on triton/acid/urea, but I cannot find a place that explains it anywhere. I can find paper that use it though.
    The power point slide really helps.
    Thanks again.
     
  5. Newquagmire

    Newquagmire 10+ Year Member

    1,268
    2
    Oct 30, 2002
    if i remember correctly, acetylation and phosphorylation cause a shift due to a change in charge, but methylation does not cause a change because it does not change the charge.

    try this papers from this group: http://dx.doi.org/10.1371/journal.pbio.0030393
     

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