disulfide linkage

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    Cysteine is Polar or Nonpolar?

    Kaplan considers Cysteine to be polar while I have read in my Cell Bio book that cysteine is nonpolar. Does anybody know what AAMC considers Cysteine to be classified under? Which brings me to my next question. When 2 cysteines come together to form a disulfide linkage, why do they form a...