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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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O tomto balíčku

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.

Kartičky v tomto balíčku

  1. Kartička 1

    Otázka

    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?

    Odpoveď

    Histidine — side chain: Cα–CH₂–imidazolyl.

  2. Kartička 2

    Otázka

    Valine → three-letter code

    Odpoveď

    Val

  3. Kartička 3

    Otázka

    Serine → one-letter code

    Odpoveď

    S

  4. Kartička 4

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

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

  5. Kartička 5

    Otázka

    Phenylalanine → three-letter code

    Odpoveď

    Phe

  6. Kartička 6

    Otázka

    Lysine → one-letter code

    Odpoveď

    K

  7. Kartička 7

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

    Alanine — side chain: Cα–CH₃.

  8. Kartička 8

    Otázka

    Isoleucine → three-letter code

    Odpoveď

    Ile

  9. Kartička 9

    Otázka

    Cysteine → one-letter code

    Odpoveď

    C

  10. Kartička 10

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

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

  11. Kartička 11

    Otázka

    Tyrosine → three-letter code

    Odpoveď

    Tyr

  12. Kartička 12

    Otázka

    Arginine → one-letter code

    Odpoveď

    R

  13. Kartička 13

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

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

  14. Kartička 14

    Otázka

    Leucine → three-letter code

    Odpoveď

    Leu

  15. Kartička 15

    Otázka

    Threonine → one-letter code

    Odpoveď

    T

  16. Kartička 16

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

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

  17. Kartička 17

    Otázka

    Tryptophan → three-letter code

    Odpoveď

    Trp

  18. Kartička 18

    Otázka

    Methionine → one-letter code

    Odpoveď

    M

  19. Kartička 19

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

    Glycine — side chain: Cα–H.

  20. Kartička 20

    Otázka

    Glutamate → three-letter code

    Odpoveď

    Glu

  21. Kartička 21

    Otázka

    Val → amino-acid name

    Odpoveď

    Valine

  22. Kartička 22

    Otázka

    S → amino-acid name

    Odpoveď

    Serine

  23. Kartička 23

    Otázka

    Asparagine → three-letter code

    Odpoveď

    Asn

  24. Kartička 24

    Otázka

    Phenylalanine → one-letter code

    Odpoveď

    F

  25. Kartička 25

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

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

  26. Kartička 26

    Otázka

    Alanine → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–CH₃.

  27. Kartička 27

    Otázka

    Ile → amino-acid name

    Odpoveď

    Isoleucine

  28. Kartička 28

    Otázka

    C → amino-acid name

    Odpoveď

    Cysteine

  29. Kartička 29

    Otázka

    Aspartate → three-letter code

    Odpoveď

    Asp

  30. Kartička 30

    Otázka

    Tyrosine → one-letter code

    Odpoveď

    Y

  31. Kartička 31

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

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

  32. Kartička 32

    Otázka

    Proline → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–(CH₂)₃–Nα.

  33. Kartička 33

    Otázka

    Leu → amino-acid name

    Odpoveď

    Leucine

  34. Kartička 34

    Otázka

    T → amino-acid name

    Odpoveď

    Threonine

  35. Kartička 35

    Otázka

    Glutamine → three-letter code

    Odpoveď

    Gln

  36. Kartička 36

    Otázka

    Tryptophan → one-letter code

    Odpoveď

    W

  37. Kartička 37

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

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

  38. Kartička 38

    Otázka

    Glycine → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–H.

  39. Kartička 39

    Otázka

    Glu → amino-acid name

    Odpoveď

    Glutamate

  40. Kartička 40

    Otázka

    Histidine → draw or recall the side chain

    Odpoveď

    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. Kartička 41

    Otázka

    K → amino-acid name

    Odpoveď

    Lysine

  42. Kartička 42

    Otázka

    Alanine → three-letter code

    Odpoveď

    Ala

  43. Kartička 43

    Otázka

    Isoleucine → one-letter code

    Odpoveď

    I

  44. Kartička 44

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

    Cysteine — side chain: Cα–CH₂–SH.

  45. Kartička 45

    Otázka

    Aspartate → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–CH₂–C(=O)–OH.

  46. Kartička 46

    Otázka

    Tyr → amino-acid name

    Odpoveď

    Tyrosine

  47. Kartička 47

    Otázka

    R → amino-acid name

    Odpoveď

    Arginine

  48. Kartička 48

    Otázka

    Proline → three-letter code

    Odpoveď

    Pro

  49. Kartička 49

    Otázka

    Leucine → one-letter code

    Odpoveď

    L

  50. Kartička 50

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

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

  51. Kartička 51

    Otázka

    Glutamine → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–CH₂–CH₂–C(=O)–NH₂.

  52. Kartička 52

    Otázka

    Trp → amino-acid name

    Odpoveď

    Tryptophan

  53. Kartička 53

    Otázka

    M → amino-acid name

    Odpoveď

    Methionine

  54. Kartička 54

    Otázka

    Glycine → three-letter code

    Odpoveď

    Gly

  55. Kartička 55

    Otázka

    Glutamate → one-letter code

    Odpoveď

    E

  56. Kartička 56

    Otázka

    Histidine → three-letter code

    Odpoveď

    His

  57. Kartička 57

    Otázka

    Valine → one-letter code

    Odpoveď

    V

  58. Kartička 58

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

    Serine — side chain: Cα–CH₂–OH.

  59. Kartička 59

    Otázka

    Asparagine → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–CH₂–C(=O)–NH₂.

  60. Kartička 60

    Otázka

    Phe → amino-acid name

    Odpoveď

    Phenylalanine

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

    120 kartičiek

    Amino Acid Flashcards: 20 Side-Chain Structures & Codes

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  61. Kartička 61

    Otázka

    I → amino-acid name

    Odpoveď

    Isoleucine

  62. Kartička 62

    Otázka

    Cysteine → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–CH₂–SH.

  63. Kartička 63

    Otázka

    Aspartate → one-letter code

    Odpoveď

    D

  64. Kartička 64

    Otázka

    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?

    Odpoveď

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

  65. Kartička 65

    Otázka

    Arginine → three-letter code

    Odpoveď

    Arg

  66. Kartička 66

    Otázka

    Pro → amino-acid name

    Odpoveď

    Proline

  67. Kartička 67

    Otázka

    L → amino-acid name

    Odpoveď

    Leucine

  68. Kartička 68

    Otázka

    Threonine → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–CH(OH)–CH₃.

  69. Kartička 69

    Otázka

    Glutamine → one-letter code

    Odpoveď

    Q

  70. Kartička 70

    Otázka

    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?

    Odpoveď

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

  71. Kartička 71

    Otázka

    Methionine → three-letter code

    Odpoveď

    Met

  72. Kartička 72

    Otázka

    Gly → amino-acid name

    Odpoveď

    Glycine

  73. Kartička 73

    Otázka

    E → amino-acid name

    Odpoveď

    Glutamate

  74. Kartička 74

    Otázka

    His → amino-acid name

    Odpoveď

    Histidine

  75. Kartička 75

    Otázka

    V → amino-acid name

    Odpoveď

    Valine

  76. Kartička 76

    Otázka

    Serine → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–CH₂–OH.

  77. Kartička 77

    Otázka

    Asparagine → one-letter code

    Odpoveď

    N

  78. Kartička 78

    Otázka

    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?

    Odpoveď

    Phenylalanine — side chain: Cα–CH₂–C₆H₅.

  79. Kartička 79

    Otázka

    Lysine → three-letter code

    Odpoveď

    Lys

  80. Kartička 80

    Otázka

    Ala → amino-acid name

    Odpoveď

    Alanine

  81. Kartička 81

    Otázka

    Proline → one-letter code

    Odpoveď

    P

  82. Kartička 82

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

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

  83. Kartička 83

    Otázka

    Threonine → three-letter code

    Odpoveď

    Thr

  84. Kartička 84

    Otázka

    Gln → amino-acid name

    Odpoveď

    Glutamine

  85. Kartička 85

    Otázka

    W → amino-acid name

    Odpoveď

    Tryptophan

  86. Kartička 86

    Otázka

    Methionine → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–CH₂–CH₂–S–CH₃.

  87. Kartička 87

    Otázka

    Glycine → one-letter code

    Odpoveď

    G

  88. Kartička 88

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

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

  89. Kartička 89

    Otázka

    Histidine → one-letter code

    Odpoveď

    H

  90. Kartička 90

    Otázka

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

    Which amino acid has this side chain?

    Odpoveď

    Valine — side chain: Cα–CH(CH₃)₂.

  91. Kartička 91

    Otázka

    Serine → three-letter code

    Odpoveď

    Ser

  92. Kartička 92

    Otázka

    Asn → amino-acid name

    Odpoveď

    Asparagine

  93. Kartička 93

    Otázka

    F → amino-acid name

    Odpoveď

    Phenylalanine

  94. Kartička 94

    Otázka

    Lysine → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–(CH₂)₄–NH₂.

  95. Kartička 95

    Otázka

    Alanine → one-letter code

    Odpoveď

    A

  96. Kartička 96

    Otázka

    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?

    Odpoveď

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

  97. Kartička 97

    Otázka

    Cysteine → three-letter code

    Odpoveď

    Cys

  98. Kartička 98

    Otázka

    Asp → amino-acid name

    Odpoveď

    Aspartate

  99. Kartička 99

    Otázka

    Y → amino-acid name

    Odpoveď

    Tyrosine

  100. Kartička 100

    Otázka

    Arginine → draw or recall the side chain

    Odpoveď

    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. Kartička 101

    Otázka

    Ser → amino-acid name

    Odpoveď

    Serine

  102. Kartička 102

    Otázka

    N → amino-acid name

    Odpoveď

    Asparagine

  103. Kartička 103

    Otázka

    Phenylalanine → draw or recall the side chain

    Odpoveď

    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. Kartička 104

    Otázka

    Lys → amino-acid name

    Odpoveď

    Lysine

  105. Kartička 105

    Otázka

    A → amino-acid name

    Odpoveď

    Alanine

  106. Kartička 106

    Otázka

    Isoleucine → draw or recall the side chain

    Odpoveď

    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. Kartička 107

    Otázka

    Cys → amino-acid name

    Odpoveď

    Cysteine

  108. Kartička 108

    Otázka

    D → amino-acid name

    Odpoveď

    Aspartate

  109. Kartička 109

    Otázka

    Tyrosine → draw or recall the side chain

    Odpoveď

    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. Kartička 110

    Otázka

    Arg → amino-acid name

    Odpoveď

    Arginine

  111. Kartička 111

    Otázka

    P → amino-acid name

    Odpoveď

    Proline

  112. Kartička 112

    Otázka

    Leucine → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–CH₂–CH(CH₃)₂.

  113. Kartička 113

    Otázka

    Thr → amino-acid name

    Odpoveď

    Threonine

  114. Kartička 114

    Otázka

    Q → amino-acid name

    Odpoveď

    Glutamine

  115. Kartička 115

    Otázka

    Tryptophan → draw or recall the side chain

    Odpoveď

    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. Kartička 116

    Otázka

    Met → amino-acid name

    Odpoveď

    Methionine

  117. Kartička 117

    Otázka

    G → amino-acid name

    Odpoveď

    Glycine

  118. Kartička 118

    Otázka

    Glutamate → draw or recall the side chain

    Odpoveď

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

    Side chain: Cα–CH₂–CH₂–C(=O)–OH.

  119. Kartička 119

    Otázka

    H → amino-acid name

    Odpoveď

    Histidine

  120. Kartička 120

    Otázka

    Valine → draw or recall the side chain

    Odpoveď

    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 kartičiek

Amino Acid Flashcards: 20 Side-Chain Structures & Codes

Učiť sa tento balíček zadarmo

Otvorí sa Nibomo, aby ste sa mohli začať učiť.