| Ala A | Arg R | Asn N | Asp D | Cys C |
| Gln Q | Glu E | Gly G | His H | Ile I |
| Leu L | Lys K | Met M | Phe F | Pro P |
| Ser S | Thr T | Trp W | Tyr Y | Val V |
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The structure of L-arginine was shown in question #9.
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The structure of L-asparagine was shown in question #5.
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The structure of L-aspartic acid was shown after incorrect answers to questions #3 & #5.
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The structure of L-cysteine was shown in question #4.
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The structure of L-glutamic acid was shown in question #3.
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The structure of glycine was shown in question #11.
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The structure of L-histidine was shown in question #12.
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The structure of L-isoleucine was shown after a correct answer to question #2.
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The structure of L-leucine was shown in question #2.
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The structure of L-lysine was shown in question #10.
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The structure of L-methionine was shown in question #6.
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The structure of L-phenylalanine was shown in question #1 and after a correct answer to question #7.
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The structure of L-proline was shown in question #13.
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The structure of L-serine was shown after a correct answer to question #4.
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The structure of L-tryptophan was shown in question #14.
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The structure of L-tyrosine was shown in question #7 and after an incorrect answer to question #1.
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The structure of L-valine was shown after a correct answer to question #8.