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Acheiver Test 1 OCHEM #87 (glycine question)

Discussion in 'DAT Discussions' started by STACM, Jun 15, 2008.

  1. STACM

    STACM 7+ Year Member

    Dec 24, 2006
    On Acheiver Test 1 OCHEM #87 Im confused as to how glycine is soluble if it is known as one of the "hydrophobic" amino acids. So then would all amino acids be soluble in water?
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  3. TarheelKid24

    TarheelKid24 2+ Year Member

    Jun 10, 2008
    Chapel Hill, NC
    As far as I know, all amino acids are soluble in polar solvents because they exist as zwitterions. However, it is the variable R groups that determines how soluble they will be...feel free to correct me if I am wrong.
  4. Hugh Mannity

    Hugh Mannity 2+ Year Member

    May 15, 2008
    You may be confused in the aspect that glycine is nonpolar when in a polypeptide. As a single amino acid, the amino group of any single amino acid takes the proton from the carboxyl making is highly polar (called zwitterions like stated above). In a polypeptide it cannot accept anything because both ends become peptide bonds, and the side groups is what you look at for solubility.

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