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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 ovom špilu

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.

Kartice u ovom špilu

  1. Kartica 1

    Pitanje

    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?

    Odgovor

    Histidine — side chain: Cα–CH₂–imidazolyl.

  2. Kartica 2

    Pitanje

    Valine → three-letter code

    Odgovor

    Val

  3. Kartica 3

    Pitanje

    Serine → one-letter code

    Odgovor

    S

  4. Kartica 4

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

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

  5. Kartica 5

    Pitanje

    Phenylalanine → three-letter code

    Odgovor

    Phe

  6. Kartica 6

    Pitanje

    Lysine → one-letter code

    Odgovor

    K

  7. Kartica 7

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

    Alanine — side chain: Cα–CH₃.

  8. Kartica 8

    Pitanje

    Isoleucine → three-letter code

    Odgovor

    Ile

  9. Kartica 9

    Pitanje

    Cysteine → one-letter code

    Odgovor

    C

  10. Kartica 10

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

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

  11. Kartica 11

    Pitanje

    Tyrosine → three-letter code

    Odgovor

    Tyr

  12. Kartica 12

    Pitanje

    Arginine → one-letter code

    Odgovor

    R

  13. Kartica 13

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

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

  14. Kartica 14

    Pitanje

    Leucine → three-letter code

    Odgovor

    Leu

  15. Kartica 15

    Pitanje

    Threonine → one-letter code

    Odgovor

    T

  16. Kartica 16

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

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

  17. Kartica 17

    Pitanje

    Tryptophan → three-letter code

    Odgovor

    Trp

  18. Kartica 18

    Pitanje

    Methionine → one-letter code

    Odgovor

    M

  19. Kartica 19

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

    Glycine — side chain: Cα–H.

  20. Kartica 20

    Pitanje

    Glutamate → three-letter code

    Odgovor

    Glu

  21. Kartica 21

    Pitanje

    Val → amino-acid name

    Odgovor

    Valine

  22. Kartica 22

    Pitanje

    S → amino-acid name

    Odgovor

    Serine

  23. Kartica 23

    Pitanje

    Asparagine → three-letter code

    Odgovor

    Asn

  24. Kartica 24

    Pitanje

    Phenylalanine → one-letter code

    Odgovor

    F

  25. Kartica 25

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

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

  26. Kartica 26

    Pitanje

    Alanine → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–CH₃.

  27. Kartica 27

    Pitanje

    Ile → amino-acid name

    Odgovor

    Isoleucine

  28. Kartica 28

    Pitanje

    C → amino-acid name

    Odgovor

    Cysteine

  29. Kartica 29

    Pitanje

    Aspartate → three-letter code

    Odgovor

    Asp

  30. Kartica 30

    Pitanje

    Tyrosine → one-letter code

    Odgovor

    Y

  31. Kartica 31

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

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

  32. Kartica 32

    Pitanje

    Proline → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–(CH₂)₃–Nα.

  33. Kartica 33

    Pitanje

    Leu → amino-acid name

    Odgovor

    Leucine

  34. Kartica 34

    Pitanje

    T → amino-acid name

    Odgovor

    Threonine

  35. Kartica 35

    Pitanje

    Glutamine → three-letter code

    Odgovor

    Gln

  36. Kartica 36

    Pitanje

    Tryptophan → one-letter code

    Odgovor

    W

  37. Kartica 37

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

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

  38. Kartica 38

    Pitanje

    Glycine → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–H.

  39. Kartica 39

    Pitanje

    Glu → amino-acid name

    Odgovor

    Glutamate

  40. Kartica 40

    Pitanje

    Histidine → draw or recall the side chain

    Odgovor

    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. Kartica 41

    Pitanje

    K → amino-acid name

    Odgovor

    Lysine

  42. Kartica 42

    Pitanje

    Alanine → three-letter code

    Odgovor

    Ala

  43. Kartica 43

    Pitanje

    Isoleucine → one-letter code

    Odgovor

    I

  44. Kartica 44

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

    Cysteine — side chain: Cα–CH₂–SH.

  45. Kartica 45

    Pitanje

    Aspartate → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–CH₂–C(=O)–OH.

  46. Kartica 46

    Pitanje

    Tyr → amino-acid name

    Odgovor

    Tyrosine

  47. Kartica 47

    Pitanje

    R → amino-acid name

    Odgovor

    Arginine

  48. Kartica 48

    Pitanje

    Proline → three-letter code

    Odgovor

    Pro

  49. Kartica 49

    Pitanje

    Leucine → one-letter code

    Odgovor

    L

  50. Kartica 50

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

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

  51. Kartica 51

    Pitanje

    Glutamine → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–CH₂–CH₂–C(=O)–NH₂.

  52. Kartica 52

    Pitanje

    Trp → amino-acid name

    Odgovor

    Tryptophan

  53. Kartica 53

    Pitanje

    M → amino-acid name

    Odgovor

    Methionine

  54. Kartica 54

    Pitanje

    Glycine → three-letter code

    Odgovor

    Gly

  55. Kartica 55

    Pitanje

    Glutamate → one-letter code

    Odgovor

    E

  56. Kartica 56

    Pitanje

    Histidine → three-letter code

    Odgovor

    His

  57. Kartica 57

    Pitanje

    Valine → one-letter code

    Odgovor

    V

  58. Kartica 58

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

    Serine — side chain: Cα–CH₂–OH.

  59. Kartica 59

    Pitanje

    Asparagine → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–CH₂–C(=O)–NH₂.

  60. Kartica 60

    Pitanje

    Phe → amino-acid name

    Odgovor

    Phenylalanine

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

    120 kartica

    Amino Acid Flashcards: 20 Side-Chain Structures & Codes

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  61. Kartica 61

    Pitanje

    I → amino-acid name

    Odgovor

    Isoleucine

  62. Kartica 62

    Pitanje

    Cysteine → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–CH₂–SH.

  63. Kartica 63

    Pitanje

    Aspartate → one-letter code

    Odgovor

    D

  64. Kartica 64

    Pitanje

    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?

    Odgovor

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

  65. Kartica 65

    Pitanje

    Arginine → three-letter code

    Odgovor

    Arg

  66. Kartica 66

    Pitanje

    Pro → amino-acid name

    Odgovor

    Proline

  67. Kartica 67

    Pitanje

    L → amino-acid name

    Odgovor

    Leucine

  68. Kartica 68

    Pitanje

    Threonine → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–CH(OH)–CH₃.

  69. Kartica 69

    Pitanje

    Glutamine → one-letter code

    Odgovor

    Q

  70. Kartica 70

    Pitanje

    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?

    Odgovor

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

  71. Kartica 71

    Pitanje

    Methionine → three-letter code

    Odgovor

    Met

  72. Kartica 72

    Pitanje

    Gly → amino-acid name

    Odgovor

    Glycine

  73. Kartica 73

    Pitanje

    E → amino-acid name

    Odgovor

    Glutamate

  74. Kartica 74

    Pitanje

    His → amino-acid name

    Odgovor

    Histidine

  75. Kartica 75

    Pitanje

    V → amino-acid name

    Odgovor

    Valine

  76. Kartica 76

    Pitanje

    Serine → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–CH₂–OH.

  77. Kartica 77

    Pitanje

    Asparagine → one-letter code

    Odgovor

    N

  78. Kartica 78

    Pitanje

    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?

    Odgovor

    Phenylalanine — side chain: Cα–CH₂–C₆H₅.

  79. Kartica 79

    Pitanje

    Lysine → three-letter code

    Odgovor

    Lys

  80. Kartica 80

    Pitanje

    Ala → amino-acid name

    Odgovor

    Alanine

  81. Kartica 81

    Pitanje

    Proline → one-letter code

    Odgovor

    P

  82. Kartica 82

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

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

  83. Kartica 83

    Pitanje

    Threonine → three-letter code

    Odgovor

    Thr

  84. Kartica 84

    Pitanje

    Gln → amino-acid name

    Odgovor

    Glutamine

  85. Kartica 85

    Pitanje

    W → amino-acid name

    Odgovor

    Tryptophan

  86. Kartica 86

    Pitanje

    Methionine → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–CH₂–CH₂–S–CH₃.

  87. Kartica 87

    Pitanje

    Glycine → one-letter code

    Odgovor

    G

  88. Kartica 88

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

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

  89. Kartica 89

    Pitanje

    Histidine → one-letter code

    Odgovor

    H

  90. Kartica 90

    Pitanje

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

    Which amino acid has this side chain?

    Odgovor

    Valine — side chain: Cα–CH(CH₃)₂.

  91. Kartica 91

    Pitanje

    Serine → three-letter code

    Odgovor

    Ser

  92. Kartica 92

    Pitanje

    Asn → amino-acid name

    Odgovor

    Asparagine

  93. Kartica 93

    Pitanje

    F → amino-acid name

    Odgovor

    Phenylalanine

  94. Kartica 94

    Pitanje

    Lysine → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–(CH₂)₄–NH₂.

  95. Kartica 95

    Pitanje

    Alanine → one-letter code

    Odgovor

    A

  96. Kartica 96

    Pitanje

    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?

    Odgovor

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

  97. Kartica 97

    Pitanje

    Cysteine → three-letter code

    Odgovor

    Cys

  98. Kartica 98

    Pitanje

    Asp → amino-acid name

    Odgovor

    Aspartate

  99. Kartica 99

    Pitanje

    Y → amino-acid name

    Odgovor

    Tyrosine

  100. Kartica 100

    Pitanje

    Arginine → draw or recall the side chain

    Odgovor

    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. Kartica 101

    Pitanje

    Ser → amino-acid name

    Odgovor

    Serine

  102. Kartica 102

    Pitanje

    N → amino-acid name

    Odgovor

    Asparagine

  103. Kartica 103

    Pitanje

    Phenylalanine → draw or recall the side chain

    Odgovor

    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. Kartica 104

    Pitanje

    Lys → amino-acid name

    Odgovor

    Lysine

  105. Kartica 105

    Pitanje

    A → amino-acid name

    Odgovor

    Alanine

  106. Kartica 106

    Pitanje

    Isoleucine → draw or recall the side chain

    Odgovor

    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. Kartica 107

    Pitanje

    Cys → amino-acid name

    Odgovor

    Cysteine

  108. Kartica 108

    Pitanje

    D → amino-acid name

    Odgovor

    Aspartate

  109. Kartica 109

    Pitanje

    Tyrosine → draw or recall the side chain

    Odgovor

    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. Kartica 110

    Pitanje

    Arg → amino-acid name

    Odgovor

    Arginine

  111. Kartica 111

    Pitanje

    P → amino-acid name

    Odgovor

    Proline

  112. Kartica 112

    Pitanje

    Leucine → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–CH₂–CH(CH₃)₂.

  113. Kartica 113

    Pitanje

    Thr → amino-acid name

    Odgovor

    Threonine

  114. Kartica 114

    Pitanje

    Q → amino-acid name

    Odgovor

    Glutamine

  115. Kartica 115

    Pitanje

    Tryptophan → draw or recall the side chain

    Odgovor

    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. Kartica 116

    Pitanje

    Met → amino-acid name

    Odgovor

    Methionine

  117. Kartica 117

    Pitanje

    G → amino-acid name

    Odgovor

    Glycine

  118. Kartica 118

    Pitanje

    Glutamate → draw or recall the side chain

    Odgovor

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

    Side chain: Cα–CH₂–CH₂–C(=O)–OH.

  119. Kartica 119

    Pitanje

    H → amino-acid name

    Odgovor

    Histidine

  120. Kartica 120

    Pitanje

    Valine → draw or recall the side chain

    Odgovor

    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 kartica

Amino Acid Flashcards: 20 Side-Chain Structures & Codes

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Nibomo se otvara kako biste mogli početi učiti.