AnmeldenKostenlos starten

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.

Von Flashcards Open Source App

Über dieses Lernkartenset

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.

Karten in diesem Lernkartenset

  1. Karte 1

    Frage

    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?

    Antwort

    Histidine — side chain: Cα–CH₂–imidazolyl.

  2. Karte 2

    Frage

    Valine → three-letter code

    Antwort

    Val

  3. Karte 3

    Frage

    Serine → one-letter code

    Antwort

    S

  4. Karte 4

    Frage

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

    Which amino acid has this side chain?

    Antwort

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

  5. Karte 5

    Frage

    Phenylalanine → three-letter code

    Antwort

    Phe

  6. Karte 6

    Frage

    Lysine → one-letter code

    Antwort

    K

  7. Karte 7

    Frage

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

    Which amino acid has this side chain?

    Antwort

    Alanine — side chain: Cα–CH₃.

  8. Karte 8

    Frage

    Isoleucine → three-letter code

    Antwort

    Ile

  9. Karte 9

    Frage

    Cysteine → one-letter code

    Antwort

    C

  10. Karte 10

    Frage

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

    Which amino acid has this side chain?

    Antwort

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

  11. Karte 11

    Frage

    Tyrosine → three-letter code

    Antwort

    Tyr

  12. Karte 12

    Frage

    Arginine → one-letter code

    Antwort

    R

  13. Karte 13

    Frage

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

    Which amino acid has this side chain?

    Antwort

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

  14. Karte 14

    Frage

    Leucine → three-letter code

    Antwort

    Leu

  15. Karte 15

    Frage

    Threonine → one-letter code

    Antwort

    T

  16. Karte 16

    Frage

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

    Which amino acid has this side chain?

    Antwort

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

  17. Karte 17

    Frage

    Tryptophan → three-letter code

    Antwort

    Trp

  18. Karte 18

    Frage

    Methionine → one-letter code

    Antwort

    M

  19. Karte 19

    Frage

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

    Which amino acid has this side chain?

    Antwort

    Glycine — side chain: Cα–H.

  20. Karte 20

    Frage

    Glutamate → three-letter code

    Antwort

    Glu

  21. Karte 21

    Frage

    Val → amino-acid name

    Antwort

    Valine

  22. Karte 22

    Frage

    S → amino-acid name

    Antwort

    Serine

  23. Karte 23

    Frage

    Asparagine → three-letter code

    Antwort

    Asn

  24. Karte 24

    Frage

    Phenylalanine → one-letter code

    Antwort

    F

  25. Karte 25

    Frage

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

    Which amino acid has this side chain?

    Antwort

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

  26. Karte 26

    Frage

    Alanine → draw or recall the side chain

    Antwort

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

    Side chain: Cα–CH₃.

  27. Karte 27

    Frage

    Ile → amino-acid name

    Antwort

    Isoleucine

  28. Karte 28

    Frage

    C → amino-acid name

    Antwort

    Cysteine

  29. Karte 29

    Frage

    Aspartate → three-letter code

    Antwort

    Asp

  30. Karte 30

    Frage

    Tyrosine → one-letter code

    Antwort

    Y

  31. Karte 31

    Frage

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

    Which amino acid has this side chain?

    Antwort

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

  32. Karte 32

    Frage

    Proline → draw or recall the side chain

    Antwort

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

    Side chain: Cα–(CH₂)₃–Nα.

  33. Karte 33

    Frage

    Leu → amino-acid name

    Antwort

    Leucine

  34. Karte 34

    Frage

    T → amino-acid name

    Antwort

    Threonine

  35. Karte 35

    Frage

    Glutamine → three-letter code

    Antwort

    Gln

  36. Karte 36

    Frage

    Tryptophan → one-letter code

    Antwort

    W

  37. Karte 37

    Frage

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

    Which amino acid has this side chain?

    Antwort

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

  38. Karte 38

    Frage

    Glycine → draw or recall the side chain

    Antwort

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

    Side chain: Cα–H.

  39. Karte 39

    Frage

    Glu → amino-acid name

    Antwort

    Glutamate

  40. Karte 40

    Frage

    Histidine → draw or recall the side chain

    Antwort

    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. Karte 41

    Frage

    K → amino-acid name

    Antwort

    Lysine

  42. Karte 42

    Frage

    Alanine → three-letter code

    Antwort

    Ala

  43. Karte 43

    Frage

    Isoleucine → one-letter code

    Antwort

    I

  44. Karte 44

    Frage

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

    Which amino acid has this side chain?

    Antwort

    Cysteine — side chain: Cα–CH₂–SH.

  45. Karte 45

    Frage

    Aspartate → draw or recall the side chain

    Antwort

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

    Side chain: Cα–CH₂–C(=O)–OH.

  46. Karte 46

    Frage

    Tyr → amino-acid name

    Antwort

    Tyrosine

  47. Karte 47

    Frage

    R → amino-acid name

    Antwort

    Arginine

  48. Karte 48

    Frage

    Proline → three-letter code

    Antwort

    Pro

  49. Karte 49

    Frage

    Leucine → one-letter code

    Antwort

    L

  50. Karte 50

    Frage

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

    Which amino acid has this side chain?

    Antwort

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

  51. Karte 51

    Frage

    Glutamine → draw or recall the side chain

    Antwort

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

    Side chain: Cα–CH₂–CH₂–C(=O)–NH₂.

  52. Karte 52

    Frage

    Trp → amino-acid name

    Antwort

    Tryptophan

  53. Karte 53

    Frage

    M → amino-acid name

    Antwort

    Methionine

  54. Karte 54

    Frage

    Glycine → three-letter code

    Antwort

    Gly

  55. Karte 55

    Frage

    Glutamate → one-letter code

    Antwort

    E

  56. Karte 56

    Frage

    Histidine → three-letter code

    Antwort

    His

  57. Karte 57

    Frage

    Valine → one-letter code

    Antwort

    V

  58. Karte 58

    Frage

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

    Which amino acid has this side chain?

    Antwort

    Serine — side chain: Cα–CH₂–OH.

  59. Karte 59

    Frage

    Asparagine → draw or recall the side chain

    Antwort

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

    Side chain: Cα–CH₂–C(=O)–NH₂.

  60. Karte 60

    Frage

    Phe → amino-acid name

    Antwort

    Phenylalanine

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

    120 Karten

    Amino Acid Flashcards: 20 Side-Chain Structures & Codes

    Mit diesem Lernkartenset kostenlos lernen

    Flashcards wird geöffnet, damit du mit dem Lernen beginnen kannst.

  61. Karte 61

    Frage

    I → amino-acid name

    Antwort

    Isoleucine

  62. Karte 62

    Frage

    Cysteine → draw or recall the side chain

    Antwort

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

    Side chain: Cα–CH₂–SH.

  63. Karte 63

    Frage

    Aspartate → one-letter code

    Antwort

    D

  64. Karte 64

    Frage

    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?

    Antwort

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

  65. Karte 65

    Frage

    Arginine → three-letter code

    Antwort

    Arg

  66. Karte 66

    Frage

    Pro → amino-acid name

    Antwort

    Proline

  67. Karte 67

    Frage

    L → amino-acid name

    Antwort

    Leucine

  68. Karte 68

    Frage

    Threonine → draw or recall the side chain

    Antwort

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

    Side chain: Cα–CH(OH)–CH₃.

  69. Karte 69

    Frage

    Glutamine → one-letter code

    Antwort

    Q

  70. Karte 70

    Frage

    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?

    Antwort

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

  71. Karte 71

    Frage

    Methionine → three-letter code

    Antwort

    Met

  72. Karte 72

    Frage

    Gly → amino-acid name

    Antwort

    Glycine

  73. Karte 73

    Frage

    E → amino-acid name

    Antwort

    Glutamate

  74. Karte 74

    Frage

    His → amino-acid name

    Antwort

    Histidine

  75. Karte 75

    Frage

    V → amino-acid name

    Antwort

    Valine

  76. Karte 76

    Frage

    Serine → draw or recall the side chain

    Antwort

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

    Side chain: Cα–CH₂–OH.

  77. Karte 77

    Frage

    Asparagine → one-letter code

    Antwort

    N

  78. Karte 78

    Frage

    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?

    Antwort

    Phenylalanine — side chain: Cα–CH₂–C₆H₅.

  79. Karte 79

    Frage

    Lysine → three-letter code

    Antwort

    Lys

  80. Karte 80

    Frage

    Ala → amino-acid name

    Antwort

    Alanine

  81. Karte 81

    Frage

    Proline → one-letter code

    Antwort

    P

  82. Karte 82

    Frage

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

    Which amino acid has this side chain?

    Antwort

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

  83. Karte 83

    Frage

    Threonine → three-letter code

    Antwort

    Thr

  84. Karte 84

    Frage

    Gln → amino-acid name

    Antwort

    Glutamine

  85. Karte 85

    Frage

    W → amino-acid name

    Antwort

    Tryptophan

  86. Karte 86

    Frage

    Methionine → draw or recall the side chain

    Antwort

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

    Side chain: Cα–CH₂–CH₂–S–CH₃.

  87. Karte 87

    Frage

    Glycine → one-letter code

    Antwort

    G

  88. Karte 88

    Frage

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

    Which amino acid has this side chain?

    Antwort

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

  89. Karte 89

    Frage

    Histidine → one-letter code

    Antwort

    H

  90. Karte 90

    Frage

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

    Which amino acid has this side chain?

    Antwort

    Valine — side chain: Cα–CH(CH₃)₂.

  91. Karte 91

    Frage

    Serine → three-letter code

    Antwort

    Ser

  92. Karte 92

    Frage

    Asn → amino-acid name

    Antwort

    Asparagine

  93. Karte 93

    Frage

    F → amino-acid name

    Antwort

    Phenylalanine

  94. Karte 94

    Frage

    Lysine → draw or recall the side chain

    Antwort

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

    Side chain: Cα–(CH₂)₄–NH₂.

  95. Karte 95

    Frage

    Alanine → one-letter code

    Antwort

    A

  96. Karte 96

    Frage

    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?

    Antwort

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

  97. Karte 97

    Frage

    Cysteine → three-letter code

    Antwort

    Cys

  98. Karte 98

    Frage

    Asp → amino-acid name

    Antwort

    Aspartate

  99. Karte 99

    Frage

    Y → amino-acid name

    Antwort

    Tyrosine

  100. Karte 100

    Frage

    Arginine → draw or recall the side chain

    Antwort

    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. Karte 101

    Frage

    Ser → amino-acid name

    Antwort

    Serine

  102. Karte 102

    Frage

    N → amino-acid name

    Antwort

    Asparagine

  103. Karte 103

    Frage

    Phenylalanine → draw or recall the side chain

    Antwort

    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. Karte 104

    Frage

    Lys → amino-acid name

    Antwort

    Lysine

  105. Karte 105

    Frage

    A → amino-acid name

    Antwort

    Alanine

  106. Karte 106

    Frage

    Isoleucine → draw or recall the side chain

    Antwort

    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. Karte 107

    Frage

    Cys → amino-acid name

    Antwort

    Cysteine

  108. Karte 108

    Frage

    D → amino-acid name

    Antwort

    Aspartate

  109. Karte 109

    Frage

    Tyrosine → draw or recall the side chain

    Antwort

    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. Karte 110

    Frage

    Arg → amino-acid name

    Antwort

    Arginine

  111. Karte 111

    Frage

    P → amino-acid name

    Antwort

    Proline

  112. Karte 112

    Frage

    Leucine → draw or recall the side chain

    Antwort

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

    Side chain: Cα–CH₂–CH(CH₃)₂.

  113. Karte 113

    Frage

    Thr → amino-acid name

    Antwort

    Threonine

  114. Karte 114

    Frage

    Q → amino-acid name

    Antwort

    Glutamine

  115. Karte 115

    Frage

    Tryptophan → draw or recall the side chain

    Antwort

    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. Karte 116

    Frage

    Met → amino-acid name

    Antwort

    Methionine

  117. Karte 117

    Frage

    G → amino-acid name

    Antwort

    Glycine

  118. Karte 118

    Frage

    Glutamate → draw or recall the side chain

    Antwort

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

    Side chain: Cα–CH₂–CH₂–C(=O)–OH.

  119. Karte 119

    Frage

    H → amino-acid name

    Antwort

    Histidine

  120. Karte 120

    Frage

    Valine → draw or recall the side chain

    Antwort

    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 Karten

Amino Acid Flashcards: 20 Side-Chain Structures & Codes

Mit diesem Lernkartenset kostenlos lernen

Flashcards wird geöffnet, damit du mit dem Lernen beginnen kannst.