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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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Tentang dek ini

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.

Kad dalam dek ini

  1. Kad 1

    Soalan

    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?

    Jawapan

    Histidine — side chain: Cα–CH₂–imidazolyl.

  2. Kad 2

    Soalan

    Valine → three-letter code

    Jawapan

    Val

  3. Kad 3

    Soalan

    Serine → one-letter code

    Jawapan

    S

  4. Kad 4

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

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

  5. Kad 5

    Soalan

    Phenylalanine → three-letter code

    Jawapan

    Phe

  6. Kad 6

    Soalan

    Lysine → one-letter code

    Jawapan

    K

  7. Kad 7

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

    Alanine — side chain: Cα–CH₃.

  8. Kad 8

    Soalan

    Isoleucine → three-letter code

    Jawapan

    Ile

  9. Kad 9

    Soalan

    Cysteine → one-letter code

    Jawapan

    C

  10. Kad 10

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

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

  11. Kad 11

    Soalan

    Tyrosine → three-letter code

    Jawapan

    Tyr

  12. Kad 12

    Soalan

    Arginine → one-letter code

    Jawapan

    R

  13. Kad 13

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

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

  14. Kad 14

    Soalan

    Leucine → three-letter code

    Jawapan

    Leu

  15. Kad 15

    Soalan

    Threonine → one-letter code

    Jawapan

    T

  16. Kad 16

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

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

  17. Kad 17

    Soalan

    Tryptophan → three-letter code

    Jawapan

    Trp

  18. Kad 18

    Soalan

    Methionine → one-letter code

    Jawapan

    M

  19. Kad 19

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

    Glycine — side chain: Cα–H.

  20. Kad 20

    Soalan

    Glutamate → three-letter code

    Jawapan

    Glu

  21. Kad 21

    Soalan

    Val → amino-acid name

    Jawapan

    Valine

  22. Kad 22

    Soalan

    S → amino-acid name

    Jawapan

    Serine

  23. Kad 23

    Soalan

    Asparagine → three-letter code

    Jawapan

    Asn

  24. Kad 24

    Soalan

    Phenylalanine → one-letter code

    Jawapan

    F

  25. Kad 25

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

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

  26. Kad 26

    Soalan

    Alanine → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–CH₃.

  27. Kad 27

    Soalan

    Ile → amino-acid name

    Jawapan

    Isoleucine

  28. Kad 28

    Soalan

    C → amino-acid name

    Jawapan

    Cysteine

  29. Kad 29

    Soalan

    Aspartate → three-letter code

    Jawapan

    Asp

  30. Kad 30

    Soalan

    Tyrosine → one-letter code

    Jawapan

    Y

  31. Kad 31

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

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

  32. Kad 32

    Soalan

    Proline → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–(CH₂)₃–Nα.

  33. Kad 33

    Soalan

    Leu → amino-acid name

    Jawapan

    Leucine

  34. Kad 34

    Soalan

    T → amino-acid name

    Jawapan

    Threonine

  35. Kad 35

    Soalan

    Glutamine → three-letter code

    Jawapan

    Gln

  36. Kad 36

    Soalan

    Tryptophan → one-letter code

    Jawapan

    W

  37. Kad 37

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

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

  38. Kad 38

    Soalan

    Glycine → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–H.

  39. Kad 39

    Soalan

    Glu → amino-acid name

    Jawapan

    Glutamate

  40. Kad 40

    Soalan

    Histidine → draw or recall the side chain

    Jawapan

    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. Kad 41

    Soalan

    K → amino-acid name

    Jawapan

    Lysine

  42. Kad 42

    Soalan

    Alanine → three-letter code

    Jawapan

    Ala

  43. Kad 43

    Soalan

    Isoleucine → one-letter code

    Jawapan

    I

  44. Kad 44

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

    Cysteine — side chain: Cα–CH₂–SH.

  45. Kad 45

    Soalan

    Aspartate → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–CH₂–C(=O)–OH.

  46. Kad 46

    Soalan

    Tyr → amino-acid name

    Jawapan

    Tyrosine

  47. Kad 47

    Soalan

    R → amino-acid name

    Jawapan

    Arginine

  48. Kad 48

    Soalan

    Proline → three-letter code

    Jawapan

    Pro

  49. Kad 49

    Soalan

    Leucine → one-letter code

    Jawapan

    L

  50. Kad 50

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

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

  51. Kad 51

    Soalan

    Glutamine → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–CH₂–CH₂–C(=O)–NH₂.

  52. Kad 52

    Soalan

    Trp → amino-acid name

    Jawapan

    Tryptophan

  53. Kad 53

    Soalan

    M → amino-acid name

    Jawapan

    Methionine

  54. Kad 54

    Soalan

    Glycine → three-letter code

    Jawapan

    Gly

  55. Kad 55

    Soalan

    Glutamate → one-letter code

    Jawapan

    E

  56. Kad 56

    Soalan

    Histidine → three-letter code

    Jawapan

    His

  57. Kad 57

    Soalan

    Valine → one-letter code

    Jawapan

    V

  58. Kad 58

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

    Serine — side chain: Cα–CH₂–OH.

  59. Kad 59

    Soalan

    Asparagine → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–CH₂–C(=O)–NH₂.

  60. Kad 60

    Soalan

    Phe → amino-acid name

    Jawapan

    Phenylalanine

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

    120 kad

    Amino Acid Flashcards: 20 Side-Chain Structures & Codes

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  61. Kad 61

    Soalan

    I → amino-acid name

    Jawapan

    Isoleucine

  62. Kad 62

    Soalan

    Cysteine → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–CH₂–SH.

  63. Kad 63

    Soalan

    Aspartate → one-letter code

    Jawapan

    D

  64. Kad 64

    Soalan

    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?

    Jawapan

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

  65. Kad 65

    Soalan

    Arginine → three-letter code

    Jawapan

    Arg

  66. Kad 66

    Soalan

    Pro → amino-acid name

    Jawapan

    Proline

  67. Kad 67

    Soalan

    L → amino-acid name

    Jawapan

    Leucine

  68. Kad 68

    Soalan

    Threonine → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–CH(OH)–CH₃.

  69. Kad 69

    Soalan

    Glutamine → one-letter code

    Jawapan

    Q

  70. Kad 70

    Soalan

    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?

    Jawapan

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

  71. Kad 71

    Soalan

    Methionine → three-letter code

    Jawapan

    Met

  72. Kad 72

    Soalan

    Gly → amino-acid name

    Jawapan

    Glycine

  73. Kad 73

    Soalan

    E → amino-acid name

    Jawapan

    Glutamate

  74. Kad 74

    Soalan

    His → amino-acid name

    Jawapan

    Histidine

  75. Kad 75

    Soalan

    V → amino-acid name

    Jawapan

    Valine

  76. Kad 76

    Soalan

    Serine → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–CH₂–OH.

  77. Kad 77

    Soalan

    Asparagine → one-letter code

    Jawapan

    N

  78. Kad 78

    Soalan

    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?

    Jawapan

    Phenylalanine — side chain: Cα–CH₂–C₆H₅.

  79. Kad 79

    Soalan

    Lysine → three-letter code

    Jawapan

    Lys

  80. Kad 80

    Soalan

    Ala → amino-acid name

    Jawapan

    Alanine

  81. Kad 81

    Soalan

    Proline → one-letter code

    Jawapan

    P

  82. Kad 82

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

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

  83. Kad 83

    Soalan

    Threonine → three-letter code

    Jawapan

    Thr

  84. Kad 84

    Soalan

    Gln → amino-acid name

    Jawapan

    Glutamine

  85. Kad 85

    Soalan

    W → amino-acid name

    Jawapan

    Tryptophan

  86. Kad 86

    Soalan

    Methionine → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–CH₂–CH₂–S–CH₃.

  87. Kad 87

    Soalan

    Glycine → one-letter code

    Jawapan

    G

  88. Kad 88

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

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

  89. Kad 89

    Soalan

    Histidine → one-letter code

    Jawapan

    H

  90. Kad 90

    Soalan

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

    Which amino acid has this side chain?

    Jawapan

    Valine — side chain: Cα–CH(CH₃)₂.

  91. Kad 91

    Soalan

    Serine → three-letter code

    Jawapan

    Ser

  92. Kad 92

    Soalan

    Asn → amino-acid name

    Jawapan

    Asparagine

  93. Kad 93

    Soalan

    F → amino-acid name

    Jawapan

    Phenylalanine

  94. Kad 94

    Soalan

    Lysine → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–(CH₂)₄–NH₂.

  95. Kad 95

    Soalan

    Alanine → one-letter code

    Jawapan

    A

  96. Kad 96

    Soalan

    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?

    Jawapan

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

  97. Kad 97

    Soalan

    Cysteine → three-letter code

    Jawapan

    Cys

  98. Kad 98

    Soalan

    Asp → amino-acid name

    Jawapan

    Aspartate

  99. Kad 99

    Soalan

    Y → amino-acid name

    Jawapan

    Tyrosine

  100. Kad 100

    Soalan

    Arginine → draw or recall the side chain

    Jawapan

    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. Kad 101

    Soalan

    Ser → amino-acid name

    Jawapan

    Serine

  102. Kad 102

    Soalan

    N → amino-acid name

    Jawapan

    Asparagine

  103. Kad 103

    Soalan

    Phenylalanine → draw or recall the side chain

    Jawapan

    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. Kad 104

    Soalan

    Lys → amino-acid name

    Jawapan

    Lysine

  105. Kad 105

    Soalan

    A → amino-acid name

    Jawapan

    Alanine

  106. Kad 106

    Soalan

    Isoleucine → draw or recall the side chain

    Jawapan

    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. Kad 107

    Soalan

    Cys → amino-acid name

    Jawapan

    Cysteine

  108. Kad 108

    Soalan

    D → amino-acid name

    Jawapan

    Aspartate

  109. Kad 109

    Soalan

    Tyrosine → draw or recall the side chain

    Jawapan

    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. Kad 110

    Soalan

    Arg → amino-acid name

    Jawapan

    Arginine

  111. Kad 111

    Soalan

    P → amino-acid name

    Jawapan

    Proline

  112. Kad 112

    Soalan

    Leucine → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–CH₂–CH(CH₃)₂.

  113. Kad 113

    Soalan

    Thr → amino-acid name

    Jawapan

    Threonine

  114. Kad 114

    Soalan

    Q → amino-acid name

    Jawapan

    Glutamine

  115. Kad 115

    Soalan

    Tryptophan → draw or recall the side chain

    Jawapan

    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. Kad 116

    Soalan

    Met → amino-acid name

    Jawapan

    Methionine

  117. Kad 117

    Soalan

    G → amino-acid name

    Jawapan

    Glycine

  118. Kad 118

    Soalan

    Glutamate → draw or recall the side chain

    Jawapan

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

    Side chain: Cα–CH₂–CH₂–C(=O)–OH.

  119. Kad 119

    Soalan

    H → amino-acid name

    Jawapan

    Histidine

  120. Kad 120

    Soalan

    Valine → draw or recall the side chain

    Jawapan

    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 kad

Amino Acid Flashcards: 20 Side-Chain Structures & Codes

Ulang kaji dek ini secara percuma

Nibomo akan dibuka supaya anda boleh mula mengulang kaji.

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