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Amino Acid Flashcards: 20 Side-Chain Structures & Codes

Learn the 20 standard amino acids with 120 flashcards for side-chain recognition and drawing, plus one- and three-letter code recall in both directions.

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Par šo kavu

These amino acid flashcards train the 20 standard amino acids as six separate recall tasks. You’ll practice side-chain structure → amino-acid name, amino-acid name → side-chain drawing, amino-acid name → three-letter code, three-letter code → amino-acid name, amino-acid name → one-letter code, and one-letter code → amino-acid name. Each target has its own card, so remembering a code never hides a missed structure.

The structure cards show only the variable side chain. A small Cα attachment marker fixes the convention without turning the shared amino-acid backbone into another recognition task; proline also shows the side chain’s connection to the backbone nitrogen. The diagrams use one neutral connectivity convention. They do not test pH-dependent charge states or stereochemistry.

The fixed sequence introduces each structure before its drawing prompt and each code before its reverse lookup for the same amino acid. It interleaves all six directions, keeps every same-amino-acid variant at least three unrelated cards apart, and separates visually or code-confusable concepts. The review scheduler handles longer-term spacing after installation.

The deck deliberately leaves out side-chain class labels because classification schemes vary. It also excludes pKa values, charge-state tables, isoelectric points, codons, nutrition categories, full-backbone recognition, nonstandard amino acids and ambiguous sequence symbols, peptide-bond and protein-folding trivia, and exam, clinical, disease, supplement, dietary, or pronunciation material. Those mappings either vary by convention or belong outside this focused side-chain-and-code recall set.

IUPAC-IUB nomenclature recommendations, NCBI’s overview of amino acids and their side chains, and the NCBI amino-acid code table were used only to verify common-knowledge facts. All prompts, answers, selection, order, molecular diagrams, metadata, and cover composition were created independently. No source or competitor prose, images, screenshots, trade dress, or logos were copied. Facts are not claimed as proprietary. The original wording, organization, metadata, diagrams, and cover are dedicated under CC0 1.0 to the extent applicable rights exist.

Kartītes šajā kavā

  1. 1. kartīte

    Jautājums

    Side-chain diagram showing CH₂ joined to a five-membered ring containing NH and N from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Histidine — side chain: Cα–CH₂–imidazolyl.

  2. 2. kartīte

    Jautājums

    Valine → three-letter code

    Atbilde

    Val

  3. 3. kartīte

    Jautājums

    Serine → one-letter code

    Atbilde

    S

  4. 4. kartīte

    Jautājums

    Side-chain diagram showing CH₂–C(=O)–NH₂ from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Asparagine — side chain: Cα–CH₂–C(=O)–NH₂.

  5. 5. kartīte

    Jautājums

    Phenylalanine → three-letter code

    Atbilde

    Phe

  6. 6. kartīte

    Jautājums

    Lysine → one-letter code

    Atbilde

    K

  7. 7. kartīte

    Jautājums

    Side-chain diagram showing one CH₃ group bonded to the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Alanine — side chain: Cα–CH₃.

  8. 8. kartīte

    Jautājums

    Isoleucine → three-letter code

    Atbilde

    Ile

  9. 9. kartīte

    Jautājums

    Cysteine → one-letter code

    Atbilde

    C

  10. 10. kartīte

    Jautājums

    Side-chain diagram showing CH₂–C(=O)–OH from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Aspartate — side chain: Cα–CH₂–C(=O)–OH.

  11. 11. kartīte

    Jautājums

    Tyrosine → three-letter code

    Atbilde

    Tyr

  12. 12. kartīte

    Jautājums

    Arginine → one-letter code

    Atbilde

    R

  13. 13. kartīte

    Jautājums

    Side-chain diagram showing three CH₂ groups linking the Cα and Nα attachment markers.

    Which amino acid has this side chain?

    Atbilde

    Proline — side chain: Cα–(CH₂)₃–Nα.

  14. 14. kartīte

    Jautājums

    Leucine → three-letter code

    Atbilde

    Leu

  15. 15. kartīte

    Jautājums

    Threonine → one-letter code

    Atbilde

    T

  16. 16. kartīte

    Jautājums

    Side-chain diagram showing CH₂–CH₂–C(=O)–NH₂ from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Glutamine — side chain: Cα–CH₂–CH₂–C(=O)–NH₂.

  17. 17. kartīte

    Jautājums

    Tryptophan → three-letter code

    Atbilde

    Trp

  18. 18. kartīte

    Jautājums

    Methionine → one-letter code

    Atbilde

    M

  19. 19. kartīte

    Jautājums

    Side-chain diagram showing a hydrogen bonded to the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Glycine — side chain: Cα–H.

  20. 20. kartīte

    Jautājums

    Glutamate → three-letter code

    Atbilde

    Glu

  21. 21. kartīte

    Jautājums

    Val → amino-acid name

    Atbilde

    Valine

  22. 22. kartīte

    Jautājums

    S → amino-acid name

    Atbilde

    Serine

  23. 23. kartīte

    Jautājums

    Asparagine → three-letter code

    Atbilde

    Asn

  24. 24. kartīte

    Jautājums

    Phenylalanine → one-letter code

    Atbilde

    F

  25. 25. kartīte

    Jautājums

    Side-chain diagram showing (CH₂)₄–NH₂ from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Lysine — side chain: Cα–(CH₂)₄–NH₂.

  26. 26. kartīte

    Jautājums

    Alanine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing one CH₃ group bonded to the Cα attachment marker.

    Side chain: Cα–CH₃.

  27. 27. kartīte

    Jautājums

    Ile → amino-acid name

    Atbilde

    Isoleucine

  28. 28. kartīte

    Jautājums

    C → amino-acid name

    Atbilde

    Cysteine

  29. 29. kartīte

    Jautājums

    Aspartate → three-letter code

    Atbilde

    Asp

  30. 30. kartīte

    Jautājums

    Tyrosine → one-letter code

    Atbilde

    Y

  31. 31. kartīte

    Jautājums

    Side-chain diagram showing (CH₂)₃–NH–C(=NH)–NH₂ from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Arginine — side chain: Cα–(CH₂)₃–NH–C(=NH)–NH₂.

  32. 32. kartīte

    Jautājums

    Proline → draw or recall the side chain

    Atbilde

    Side-chain diagram showing three CH₂ groups linking the Cα and Nα attachment markers.

    Side chain: Cα–(CH₂)₃–Nα.

  33. 33. kartīte

    Jautājums

    Leu → amino-acid name

    Atbilde

    Leucine

  34. 34. kartīte

    Jautājums

    T → amino-acid name

    Atbilde

    Threonine

  35. 35. kartīte

    Jautājums

    Glutamine → three-letter code

    Atbilde

    Gln

  36. 36. kartīte

    Jautājums

    Tryptophan → one-letter code

    Atbilde

    W

  37. 37. kartīte

    Jautājums

    Side-chain diagram showing CH₂–CH₂–S–CH₃ from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Methionine — side chain: Cα–CH₂–CH₂–S–CH₃.

  38. 38. kartīte

    Jautājums

    Glycine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing a hydrogen bonded to the Cα attachment marker.

    Side chain: Cα–H.

  39. 39. kartīte

    Jautājums

    Glu → amino-acid name

    Atbilde

    Glutamate

  40. 40. kartīte

    Jautājums

    Histidine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂ joined to a five-membered ring containing NH and N from the Cα attachment marker.

    Side chain: Cα–CH₂–imidazolyl.

  41. 41. kartīte

    Jautājums

    K → amino-acid name

    Atbilde

    Lysine

  42. 42. kartīte

    Jautājums

    Alanine → three-letter code

    Atbilde

    Ala

  43. 43. kartīte

    Jautājums

    Isoleucine → one-letter code

    Atbilde

    I

  44. 44. kartīte

    Jautājums

    Side-chain diagram showing CH₂–SH from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Cysteine — side chain: Cα–CH₂–SH.

  45. 45. kartīte

    Jautājums

    Aspartate → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂–C(=O)–OH from the Cα attachment marker.

    Side chain: Cα–CH₂–C(=O)–OH.

  46. 46. kartīte

    Jautājums

    Tyr → amino-acid name

    Atbilde

    Tyrosine

  47. 47. kartīte

    Jautājums

    R → amino-acid name

    Atbilde

    Arginine

  48. 48. kartīte

    Jautājums

    Proline → three-letter code

    Atbilde

    Pro

  49. 49. kartīte

    Jautājums

    Leucine → one-letter code

    Atbilde

    L

  50. 50. kartīte

    Jautājums

    Side-chain diagram showing CH bonded to OH and CH₃ from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Threonine — side chain: Cα–CH(OH)–CH₃.

  51. 51. kartīte

    Jautājums

    Glutamine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂–CH₂–C(=O)–NH₂ from the Cα attachment marker.

    Side chain: Cα–CH₂–CH₂–C(=O)–NH₂.

  52. 52. kartīte

    Jautājums

    Trp → amino-acid name

    Atbilde

    Tryptophan

  53. 53. kartīte

    Jautājums

    M → amino-acid name

    Atbilde

    Methionine

  54. 54. kartīte

    Jautājums

    Glycine → three-letter code

    Atbilde

    Gly

  55. 55. kartīte

    Jautājums

    Glutamate → one-letter code

    Atbilde

    E

  56. 56. kartīte

    Jautājums

    Histidine → three-letter code

    Atbilde

    His

  57. 57. kartīte

    Jautājums

    Valine → one-letter code

    Atbilde

    V

  58. 58. kartīte

    Jautājums

    Side-chain diagram showing CH₂–OH from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Serine — side chain: Cα–CH₂–OH.

  59. 59. kartīte

    Jautājums

    Asparagine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂–C(=O)–NH₂ from the Cα attachment marker.

    Side chain: Cα–CH₂–C(=O)–NH₂.

  60. 60. kartīte

    Jautājums

    Phe → amino-acid name

    Atbilde

    Phenylalanine

    Abstract molecular study scene with colorful ball-and-stick side-chain forms arranged around an open center.

    120 kartīšu

    Amino Acid Flashcards: 20 Side-Chain Structures & Codes

    Mācies šo kavu bez maksas

    Atvērsies Nibomo, lai vari sākt mācīties.

  61. 61. kartīte

    Jautājums

    I → amino-acid name

    Atbilde

    Isoleucine

  62. 62. kartīte

    Jautājums

    Cysteine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂–SH from the Cα attachment marker.

    Side chain: Cα–CH₂–SH.

  63. 63. kartīte

    Jautājums

    Aspartate → one-letter code

    Atbilde

    D

  64. 64. kartīte

    Jautājums

    Side-chain diagram showing CH₂ joined to a six-membered ring with an opposite OH group from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Tyrosine — side chain: Cα–CH₂–C₆H₄–OH (para).

  65. 65. kartīte

    Jautājums

    Arginine → three-letter code

    Atbilde

    Arg

  66. 66. kartīte

    Jautājums

    Pro → amino-acid name

    Atbilde

    Proline

  67. 67. kartīte

    Jautājums

    L → amino-acid name

    Atbilde

    Leucine

  68. 68. kartīte

    Jautājums

    Threonine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH bonded to OH and CH₃ from the Cα attachment marker.

    Side chain: Cα–CH(OH)–CH₃.

  69. 69. kartīte

    Jautājums

    Glutamine → one-letter code

    Atbilde

    Q

  70. 70. kartīte

    Jautājums

    Side-chain diagram showing the Cα attachment marker joined through CH₂ to position 3 of fused five- and six-membered rings containing NH.

    Which amino acid has this side chain?

    Atbilde

    Tryptophan — side chain: Cα–CH₂–indol-3-yl.

  71. 71. kartīte

    Jautājums

    Methionine → three-letter code

    Atbilde

    Met

  72. 72. kartīte

    Jautājums

    Gly → amino-acid name

    Atbilde

    Glycine

  73. 73. kartīte

    Jautājums

    E → amino-acid name

    Atbilde

    Glutamate

  74. 74. kartīte

    Jautājums

    His → amino-acid name

    Atbilde

    Histidine

  75. 75. kartīte

    Jautājums

    V → amino-acid name

    Atbilde

    Valine

  76. 76. kartīte

    Jautājums

    Serine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂–OH from the Cα attachment marker.

    Side chain: Cα–CH₂–OH.

  77. 77. kartīte

    Jautājums

    Asparagine → one-letter code

    Atbilde

    N

  78. 78. kartīte

    Jautājums

    Side-chain diagram showing CH₂ joined to a six-membered ring with alternating double bonds from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Phenylalanine — side chain: Cα–CH₂–C₆H₅.

  79. 79. kartīte

    Jautājums

    Lysine → three-letter code

    Atbilde

    Lys

  80. 80. kartīte

    Jautājums

    Ala → amino-acid name

    Atbilde

    Alanine

  81. 81. kartīte

    Jautājums

    Proline → one-letter code

    Atbilde

    P

  82. 82. kartīte

    Jautājums

    Side-chain diagram showing CH₂–CH with two terminal CH₃ branches from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Leucine — side chain: Cα–CH₂–CH(CH₃)₂.

  83. 83. kartīte

    Jautājums

    Threonine → three-letter code

    Atbilde

    Thr

  84. 84. kartīte

    Jautājums

    Gln → amino-acid name

    Atbilde

    Glutamine

  85. 85. kartīte

    Jautājums

    W → amino-acid name

    Atbilde

    Tryptophan

  86. 86. kartīte

    Jautājums

    Methionine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂–CH₂–S–CH₃ from the Cα attachment marker.

    Side chain: Cα–CH₂–CH₂–S–CH₃.

  87. 87. kartīte

    Jautājums

    Glycine → one-letter code

    Atbilde

    G

  88. 88. kartīte

    Jautājums

    Side-chain diagram showing CH₂–CH₂–C(=O)–OH from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Glutamate — side chain: Cα–CH₂–CH₂–C(=O)–OH.

  89. 89. kartīte

    Jautājums

    Histidine → one-letter code

    Atbilde

    H

  90. 90. kartīte

    Jautājums

    Side-chain diagram showing CH bonded to two CH₃ branches from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Valine — side chain: Cα–CH(CH₃)₂.

  91. 91. kartīte

    Jautājums

    Serine → three-letter code

    Atbilde

    Ser

  92. 92. kartīte

    Jautājums

    Asn → amino-acid name

    Atbilde

    Asparagine

  93. 93. kartīte

    Jautājums

    F → amino-acid name

    Atbilde

    Phenylalanine

  94. 94. kartīte

    Jautājums

    Lysine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing (CH₂)₄–NH₂ from the Cα attachment marker.

    Side chain: Cα–(CH₂)₄–NH₂.

  95. 95. kartīte

    Jautājums

    Alanine → one-letter code

    Atbilde

    A

  96. 96. kartīte

    Jautājums

    Side-chain diagram showing CH with one CH₃ branch and one CH₂–CH₃ branch from the Cα attachment marker.

    Which amino acid has this side chain?

    Atbilde

    Isoleucine — side chain: Cα–CH(CH₃)–CH₂–CH₃.

  97. 97. kartīte

    Jautājums

    Cysteine → three-letter code

    Atbilde

    Cys

  98. 98. kartīte

    Jautājums

    Asp → amino-acid name

    Atbilde

    Aspartate

  99. 99. kartīte

    Jautājums

    Y → amino-acid name

    Atbilde

    Tyrosine

  100. 100. kartīte

    Jautājums

    Arginine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing (CH₂)₃–NH–C(=NH)–NH₂ from the Cα attachment marker.

    Side chain: Cα–(CH₂)₃–NH–C(=NH)–NH₂.

  101. 101. kartīte

    Jautājums

    Ser → amino-acid name

    Atbilde

    Serine

  102. 102. kartīte

    Jautājums

    N → amino-acid name

    Atbilde

    Asparagine

  103. 103. kartīte

    Jautājums

    Phenylalanine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂ joined to a six-membered ring with alternating double bonds from the Cα attachment marker.

    Side chain: Cα–CH₂–C₆H₅.

  104. 104. kartīte

    Jautājums

    Lys → amino-acid name

    Atbilde

    Lysine

  105. 105. kartīte

    Jautājums

    A → amino-acid name

    Atbilde

    Alanine

  106. 106. kartīte

    Jautājums

    Isoleucine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH with one CH₃ branch and one CH₂–CH₃ branch from the Cα attachment marker.

    Side chain: Cα–CH(CH₃)–CH₂–CH₃.

  107. 107. kartīte

    Jautājums

    Cys → amino-acid name

    Atbilde

    Cysteine

  108. 108. kartīte

    Jautājums

    D → amino-acid name

    Atbilde

    Aspartate

  109. 109. kartīte

    Jautājums

    Tyrosine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂ joined to a six-membered ring with an opposite OH group from the Cα attachment marker.

    Side chain: Cα–CH₂–C₆H₄–OH (para).

  110. 110. kartīte

    Jautājums

    Arg → amino-acid name

    Atbilde

    Arginine

  111. 111. kartīte

    Jautājums

    P → amino-acid name

    Atbilde

    Proline

  112. 112. kartīte

    Jautājums

    Leucine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂–CH with two terminal CH₃ branches from the Cα attachment marker.

    Side chain: Cα–CH₂–CH(CH₃)₂.

  113. 113. kartīte

    Jautājums

    Thr → amino-acid name

    Atbilde

    Threonine

  114. 114. kartīte

    Jautājums

    Q → amino-acid name

    Atbilde

    Glutamine

  115. 115. kartīte

    Jautājums

    Tryptophan → draw or recall the side chain

    Atbilde

    Side-chain diagram showing the Cα attachment marker joined through CH₂ to position 3 of fused five- and six-membered rings containing NH.

    Side chain: Cα–CH₂–indol-3-yl.

  116. 116. kartīte

    Jautājums

    Met → amino-acid name

    Atbilde

    Methionine

  117. 117. kartīte

    Jautājums

    G → amino-acid name

    Atbilde

    Glycine

  118. 118. kartīte

    Jautājums

    Glutamate → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH₂–CH₂–C(=O)–OH from the Cα attachment marker.

    Side chain: Cα–CH₂–CH₂–C(=O)–OH.

  119. 119. kartīte

    Jautājums

    H → amino-acid name

    Atbilde

    Histidine

  120. 120. kartīte

    Jautājums

    Valine → draw or recall the side chain

    Atbilde

    Side-chain diagram showing CH bonded to two CH₃ branches from the Cα attachment marker.

    Side chain: Cα–CH(CH₃)₂.

Abstract molecular study scene with colorful ball-and-stick side-chain forms arranged around an open center.

120 kartīšu

Amino Acid Flashcards: 20 Side-Chain Structures & Codes

Mācies šo kavu bez maksas

Atvērsies Nibomo, lai vari sākt mācīties.