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dtgk 15/07

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addict | 14:57 Sat 15th Jul 2006 | Quizzes & Puzzles
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37d Amino acid that is a component of proteins and found in cells of the immune system, cinnnective tissues, hair and skin
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I have cystine. not sure if it's right!
Yes, cystine
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Many thanks Wella and dot & dash

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dtgk 15/07

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