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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.

作者 Flashcards Open Source App

关于这套卡组

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.

这套卡组中的卡片

  1. 卡片 1

    问题

    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?

    答案

    Histidine — side chain: Cα–CH₂–imidazolyl.

  2. 卡片 2

    问题

    Valine → three-letter code

    答案

    Val

  3. 卡片 3

    问题

    Serine → one-letter code

    答案

    S

  4. 卡片 4

    问题

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

    Which amino acid has this side chain?

    答案

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

  5. 卡片 5

    问题

    Phenylalanine → three-letter code

    答案

    Phe

  6. 卡片 6

    问题

    Lysine → one-letter code

    答案

    K

  7. 卡片 7

    问题

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

    Which amino acid has this side chain?

    答案

    Alanine — side chain: Cα–CH₃.

  8. 卡片 8

    问题

    Isoleucine → three-letter code

    答案

    Ile

  9. 卡片 9

    问题

    Cysteine → one-letter code

    答案

    C

  10. 卡片 10

    问题

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

    Which amino acid has this side chain?

    答案

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

  11. 卡片 11

    问题

    Tyrosine → three-letter code

    答案

    Tyr

  12. 卡片 12

    问题

    Arginine → one-letter code

    答案

    R

  13. 卡片 13

    问题

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

    Which amino acid has this side chain?

    答案

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

  14. 卡片 14

    问题

    Leucine → three-letter code

    答案

    Leu

  15. 卡片 15

    问题

    Threonine → one-letter code

    答案

    T

  16. 卡片 16

    问题

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

    Which amino acid has this side chain?

    答案

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

  17. 卡片 17

    问题

    Tryptophan → three-letter code

    答案

    Trp

  18. 卡片 18

    问题

    Methionine → one-letter code

    答案

    M

  19. 卡片 19

    问题

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

    Which amino acid has this side chain?

    答案

    Glycine — side chain: Cα–H.

  20. 卡片 20

    问题

    Glutamate → three-letter code

    答案

    Glu

  21. 卡片 21

    问题

    Val → amino-acid name

    答案

    Valine

  22. 卡片 22

    问题

    S → amino-acid name

    答案

    Serine

  23. 卡片 23

    问题

    Asparagine → three-letter code

    答案

    Asn

  24. 卡片 24

    问题

    Phenylalanine → one-letter code

    答案

    F

  25. 卡片 25

    问题

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

    Which amino acid has this side chain?

    答案

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

  26. 卡片 26

    问题

    Alanine → draw or recall the side chain

    答案

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

    Side chain: Cα–CH₃.

  27. 卡片 27

    问题

    Ile → amino-acid name

    答案

    Isoleucine

  28. 卡片 28

    问题

    C → amino-acid name

    答案

    Cysteine

  29. 卡片 29

    问题

    Aspartate → three-letter code

    答案

    Asp

  30. 卡片 30

    问题

    Tyrosine → one-letter code

    答案

    Y

  31. 卡片 31

    问题

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

    Which amino acid has this side chain?

    答案

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

  32. 卡片 32

    问题

    Proline → draw or recall the side chain

    答案

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

    Side chain: Cα–(CH₂)₃–Nα.

  33. 卡片 33

    问题

    Leu → amino-acid name

    答案

    Leucine

  34. 卡片 34

    问题

    T → amino-acid name

    答案

    Threonine

  35. 卡片 35

    问题

    Glutamine → three-letter code

    答案

    Gln

  36. 卡片 36

    问题

    Tryptophan → one-letter code

    答案

    W

  37. 卡片 37

    问题

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

    Which amino acid has this side chain?

    答案

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

  38. 卡片 38

    问题

    Glycine → draw or recall the side chain

    答案

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

    Side chain: Cα–H.

  39. 卡片 39

    问题

    Glu → amino-acid name

    答案

    Glutamate

  40. 卡片 40

    问题

    Histidine → draw or recall the side chain

    答案

    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. 卡片 41

    问题

    K → amino-acid name

    答案

    Lysine

  42. 卡片 42

    问题

    Alanine → three-letter code

    答案

    Ala

  43. 卡片 43

    问题

    Isoleucine → one-letter code

    答案

    I

  44. 卡片 44

    问题

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

    Which amino acid has this side chain?

    答案

    Cysteine — side chain: Cα–CH₂–SH.

  45. 卡片 45

    问题

    Aspartate → draw or recall the side chain

    答案

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

    Side chain: Cα–CH₂–C(=O)–OH.

  46. 卡片 46

    问题

    Tyr → amino-acid name

    答案

    Tyrosine

  47. 卡片 47

    问题

    R → amino-acid name

    答案

    Arginine

  48. 卡片 48

    问题

    Proline → three-letter code

    答案

    Pro

  49. 卡片 49

    问题

    Leucine → one-letter code

    答案

    L

  50. 卡片 50

    问题

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

    Which amino acid has this side chain?

    答案

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

  51. 卡片 51

    问题

    Glutamine → draw or recall the side chain

    答案

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

    Side chain: Cα–CH₂–CH₂–C(=O)–NH₂.

  52. 卡片 52

    问题

    Trp → amino-acid name

    答案

    Tryptophan

  53. 卡片 53

    问题

    M → amino-acid name

    答案

    Methionine

  54. 卡片 54

    问题

    Glycine → three-letter code

    答案

    Gly

  55. 卡片 55

    问题

    Glutamate → one-letter code

    答案

    E

  56. 卡片 56

    问题

    Histidine → three-letter code

    答案

    His

  57. 卡片 57

    问题

    Valine → one-letter code

    答案

    V

  58. 卡片 58

    问题

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

    Which amino acid has this side chain?

    答案

    Serine — side chain: Cα–CH₂–OH.

  59. 卡片 59

    问题

    Asparagine → draw or recall the side chain

    答案

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

    Side chain: Cα–CH₂–C(=O)–NH₂.

  60. 卡片 60

    问题

    Phe → amino-acid name

    答案

    Phenylalanine

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

    120张卡片

    Amino Acid Flashcards: 20 Side-Chain Structures & Codes

    免费学习这套卡组

    Flashcards 将打开，你可以立即开始学习。

  61. 卡片 61

    问题

    I → amino-acid name

    答案

    Isoleucine

  62. 卡片 62

    问题

    Cysteine → draw or recall the side chain

    答案

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

    Side chain: Cα–CH₂–SH.

  63. 卡片 63

    问题

    Aspartate → one-letter code

    答案

    D

  64. 卡片 64

    问题

    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?

    答案

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

  65. 卡片 65

    问题

    Arginine → three-letter code

    答案

    Arg

  66. 卡片 66

    问题

    Pro → amino-acid name

    答案

    Proline

  67. 卡片 67

    问题

    L → amino-acid name

    答案

    Leucine

  68. 卡片 68

    问题

    Threonine → draw or recall the side chain

    答案

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

    Side chain: Cα–CH(OH)–CH₃.

  69. 卡片 69

    问题

    Glutamine → one-letter code

    答案

    Q

  70. 卡片 70

    问题

    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?

    答案

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

  71. 卡片 71

    问题

    Methionine → three-letter code

    答案

    Met

  72. 卡片 72

    问题

    Gly → amino-acid name

    答案

    Glycine

  73. 卡片 73

    问题

    E → amino-acid name

    答案

    Glutamate

  74. 卡片 74

    问题

    His → amino-acid name

    答案

    Histidine

  75. 卡片 75

    问题

    V → amino-acid name

    答案

    Valine

  76. 卡片 76

    问题

    Serine → draw or recall the side chain

    答案

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

    Side chain: Cα–CH₂–OH.

  77. 卡片 77

    问题

    Asparagine → one-letter code

    答案

    N

  78. 卡片 78

    问题

    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?

    答案

    Phenylalanine — side chain: Cα–CH₂–C₆H₅.

  79. 卡片 79

    问题

    Lysine → three-letter code

    答案

    Lys

  80. 卡片 80

    问题

    Ala → amino-acid name

    答案

    Alanine

  81. 卡片 81

    问题

    Proline → one-letter code

    答案

    P

  82. 卡片 82

    问题

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

    Which amino acid has this side chain?

    答案

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

  83. 卡片 83

    问题

    Threonine → three-letter code

    答案

    Thr

  84. 卡片 84

    问题

    Gln → amino-acid name

    答案

    Glutamine

  85. 卡片 85

    问题

    W → amino-acid name

    答案

    Tryptophan

  86. 卡片 86

    问题

    Methionine → draw or recall the side chain

    答案

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

    Side chain: Cα–CH₂–CH₂–S–CH₃.

  87. 卡片 87

    问题

    Glycine → one-letter code

    答案

    G

  88. 卡片 88

    问题

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

    Which amino acid has this side chain?

    答案

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

  89. 卡片 89

    问题

    Histidine → one-letter code

    答案

    H

  90. 卡片 90

    问题

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

    Which amino acid has this side chain?

    答案

    Valine — side chain: Cα–CH(CH₃)₂.

  91. 卡片 91

    问题

    Serine → three-letter code

    答案

    Ser

  92. 卡片 92

    问题

    Asn → amino-acid name

    答案

    Asparagine

  93. 卡片 93

    问题

    F → amino-acid name

    答案

    Phenylalanine

  94. 卡片 94

    问题

    Lysine → draw or recall the side chain

    答案

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

    Side chain: Cα–(CH₂)₄–NH₂.

  95. 卡片 95

    问题

    Alanine → one-letter code

    答案

    A

  96. 卡片 96

    问题

    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?

    答案

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

  97. 卡片 97

    问题

    Cysteine → three-letter code

    答案

    Cys

  98. 卡片 98

    问题

    Asp → amino-acid name

    答案

    Aspartate

  99. 卡片 99

    问题

    Y → amino-acid name

    答案

    Tyrosine

  100. 卡片 100

    问题

    Arginine → draw or recall the side chain

    答案

    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. 卡片 101

    问题

    Ser → amino-acid name

    答案

    Serine

  102. 卡片 102

    问题

    N → amino-acid name

    答案

    Asparagine

  103. 卡片 103

    问题

    Phenylalanine → draw or recall the side chain

    答案

    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. 卡片 104

    问题

    Lys → amino-acid name

    答案

    Lysine

  105. 卡片 105

    问题

    A → amino-acid name

    答案

    Alanine

  106. 卡片 106

    问题

    Isoleucine → draw or recall the side chain

    答案

    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. 卡片 107

    问题

    Cys → amino-acid name

    答案

    Cysteine

  108. 卡片 108

    问题

    D → amino-acid name

    答案

    Aspartate

  109. 卡片 109

    问题

    Tyrosine → draw or recall the side chain

    答案

    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. 卡片 110

    问题

    Arg → amino-acid name

    答案

    Arginine

  111. 卡片 111

    问题

    P → amino-acid name

    答案

    Proline

  112. 卡片 112

    问题

    Leucine → draw or recall the side chain

    答案

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

    Side chain: Cα–CH₂–CH(CH₃)₂.

  113. 卡片 113

    问题

    Thr → amino-acid name

    答案

    Threonine

  114. 卡片 114

    问题

    Q → amino-acid name

    答案

    Glutamine

  115. 卡片 115

    问题

    Tryptophan → draw or recall the side chain

    答案

    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. 卡片 116

    问题

    Met → amino-acid name

    答案

    Methionine

  117. 卡片 117

    问题

    G → amino-acid name

    答案

    Glycine

  118. 卡片 118

    问题

    Glutamate → draw or recall the side chain

    答案

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

    Side chain: Cα–CH₂–CH₂–C(=O)–OH.

  119. 卡片 119

    问题

    H → amino-acid name

    答案

    Histidine

  120. 卡片 120

    问题

    Valine → draw or recall the side chain

    答案

    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张卡片

Amino Acid Flashcards: 20 Side-Chain Structures & Codes

免费学习这套卡组

Flashcards 将打开，你可以立即开始学习。