A mixture of 15 amino acids gave the fingerprint shown in the below (see also Problem 42). Identify the spots. (Hint 1: Pro reacts with ninhydrin to form a yellow color; Phe and Tyr form a yellow-green color. Hint 2: Count the number of spots before you start.)

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Θ Starting mixture: Ala lle Arg Leu Thr Asp Met Trp Glu Phe Tyr Gly Pro Val Ser Origin Chromatography