Odd One Out #5
Chemistry
Level
1
I did not tell you to stop doing it!
Hint: To give Ruhemann's purple, or not to give, that is the experiment!
This is part of the Odd One Out set.
Threonine
Tryptophan
Cysteine
Proline
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1 solution
The hint indicates the blue known as Ruhemann's Purple, which can be achieved by treating an amino acid with ninhydrin. The only amino acid which does not turn Ruhemann's Purple is Proline, which turns yellow.