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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.

Por el autor Flashcards Open Source App

Sobre este mazo

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.

Tarjetas de este mazo

  1. Tarjeta 1

    Pregunta

    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?

    Respuesta

    Histidine — side chain: Cα–CH₂–imidazolyl.

  2. Tarjeta 2

    Pregunta

    Valine → three-letter code

    Respuesta

    Val

  3. Tarjeta 3

    Pregunta

    Serine → one-letter code

    Respuesta

    S

  4. Tarjeta 4

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

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

  5. Tarjeta 5

    Pregunta

    Phenylalanine → three-letter code

    Respuesta

    Phe

  6. Tarjeta 6

    Pregunta

    Lysine → one-letter code

    Respuesta

    K

  7. Tarjeta 7

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

    Alanine — side chain: Cα–CH₃.

  8. Tarjeta 8

    Pregunta

    Isoleucine → three-letter code

    Respuesta

    Ile

  9. Tarjeta 9

    Pregunta

    Cysteine → one-letter code

    Respuesta

    C

  10. Tarjeta 10

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

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

  11. Tarjeta 11

    Pregunta

    Tyrosine → three-letter code

    Respuesta

    Tyr

  12. Tarjeta 12

    Pregunta

    Arginine → one-letter code

    Respuesta

    R

  13. Tarjeta 13

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

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

  14. Tarjeta 14

    Pregunta

    Leucine → three-letter code

    Respuesta

    Leu

  15. Tarjeta 15

    Pregunta

    Threonine → one-letter code

    Respuesta

    T

  16. Tarjeta 16

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

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

  17. Tarjeta 17

    Pregunta

    Tryptophan → three-letter code

    Respuesta

    Trp

  18. Tarjeta 18

    Pregunta

    Methionine → one-letter code

    Respuesta

    M

  19. Tarjeta 19

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

    Glycine — side chain: Cα–H.

  20. Tarjeta 20

    Pregunta

    Glutamate → three-letter code

    Respuesta

    Glu

  21. Tarjeta 21

    Pregunta

    Val → amino-acid name

    Respuesta

    Valine

  22. Tarjeta 22

    Pregunta

    S → amino-acid name

    Respuesta

    Serine

  23. Tarjeta 23

    Pregunta

    Asparagine → three-letter code

    Respuesta

    Asn

  24. Tarjeta 24

    Pregunta

    Phenylalanine → one-letter code

    Respuesta

    F

  25. Tarjeta 25

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

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

  26. Tarjeta 26

    Pregunta

    Alanine → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–CH₃.

  27. Tarjeta 27

    Pregunta

    Ile → amino-acid name

    Respuesta

    Isoleucine

  28. Tarjeta 28

    Pregunta

    C → amino-acid name

    Respuesta

    Cysteine

  29. Tarjeta 29

    Pregunta

    Aspartate → three-letter code

    Respuesta

    Asp

  30. Tarjeta 30

    Pregunta

    Tyrosine → one-letter code

    Respuesta

    Y

  31. Tarjeta 31

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

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

  32. Tarjeta 32

    Pregunta

    Proline → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–(CH₂)₃–Nα.

  33. Tarjeta 33

    Pregunta

    Leu → amino-acid name

    Respuesta

    Leucine

  34. Tarjeta 34

    Pregunta

    T → amino-acid name

    Respuesta

    Threonine

  35. Tarjeta 35

    Pregunta

    Glutamine → three-letter code

    Respuesta

    Gln

  36. Tarjeta 36

    Pregunta

    Tryptophan → one-letter code

    Respuesta

    W

  37. Tarjeta 37

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

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

  38. Tarjeta 38

    Pregunta

    Glycine → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–H.

  39. Tarjeta 39

    Pregunta

    Glu → amino-acid name

    Respuesta

    Glutamate

  40. Tarjeta 40

    Pregunta

    Histidine → draw or recall the side chain

    Respuesta

    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. Tarjeta 41

    Pregunta

    K → amino-acid name

    Respuesta

    Lysine

  42. Tarjeta 42

    Pregunta

    Alanine → three-letter code

    Respuesta

    Ala

  43. Tarjeta 43

    Pregunta

    Isoleucine → one-letter code

    Respuesta

    I

  44. Tarjeta 44

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

    Cysteine — side chain: Cα–CH₂–SH.

  45. Tarjeta 45

    Pregunta

    Aspartate → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–CH₂–C(=O)–OH.

  46. Tarjeta 46

    Pregunta

    Tyr → amino-acid name

    Respuesta

    Tyrosine

  47. Tarjeta 47

    Pregunta

    R → amino-acid name

    Respuesta

    Arginine

  48. Tarjeta 48

    Pregunta

    Proline → three-letter code

    Respuesta

    Pro

  49. Tarjeta 49

    Pregunta

    Leucine → one-letter code

    Respuesta

    L

  50. Tarjeta 50

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

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

  51. Tarjeta 51

    Pregunta

    Glutamine → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–CH₂–CH₂–C(=O)–NH₂.

  52. Tarjeta 52

    Pregunta

    Trp → amino-acid name

    Respuesta

    Tryptophan

  53. Tarjeta 53

    Pregunta

    M → amino-acid name

    Respuesta

    Methionine

  54. Tarjeta 54

    Pregunta

    Glycine → three-letter code

    Respuesta

    Gly

  55. Tarjeta 55

    Pregunta

    Glutamate → one-letter code

    Respuesta

    E

  56. Tarjeta 56

    Pregunta

    Histidine → three-letter code

    Respuesta

    His

  57. Tarjeta 57

    Pregunta

    Valine → one-letter code

    Respuesta

    V

  58. Tarjeta 58

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

    Serine — side chain: Cα–CH₂–OH.

  59. Tarjeta 59

    Pregunta

    Asparagine → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–CH₂–C(=O)–NH₂.

  60. Tarjeta 60

    Pregunta

    Phe → amino-acid name

    Respuesta

    Phenylalanine

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

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    Amino Acid Flashcards: 20 Side-Chain Structures & Codes

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  61. Tarjeta 61

    Pregunta

    I → amino-acid name

    Respuesta

    Isoleucine

  62. Tarjeta 62

    Pregunta

    Cysteine → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–CH₂–SH.

  63. Tarjeta 63

    Pregunta

    Aspartate → one-letter code

    Respuesta

    D

  64. Tarjeta 64

    Pregunta

    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?

    Respuesta

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

  65. Tarjeta 65

    Pregunta

    Arginine → three-letter code

    Respuesta

    Arg

  66. Tarjeta 66

    Pregunta

    Pro → amino-acid name

    Respuesta

    Proline

  67. Tarjeta 67

    Pregunta

    L → amino-acid name

    Respuesta

    Leucine

  68. Tarjeta 68

    Pregunta

    Threonine → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–CH(OH)–CH₃.

  69. Tarjeta 69

    Pregunta

    Glutamine → one-letter code

    Respuesta

    Q

  70. Tarjeta 70

    Pregunta

    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?

    Respuesta

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

  71. Tarjeta 71

    Pregunta

    Methionine → three-letter code

    Respuesta

    Met

  72. Tarjeta 72

    Pregunta

    Gly → amino-acid name

    Respuesta

    Glycine

  73. Tarjeta 73

    Pregunta

    E → amino-acid name

    Respuesta

    Glutamate

  74. Tarjeta 74

    Pregunta

    His → amino-acid name

    Respuesta

    Histidine

  75. Tarjeta 75

    Pregunta

    V → amino-acid name

    Respuesta

    Valine

  76. Tarjeta 76

    Pregunta

    Serine → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–CH₂–OH.

  77. Tarjeta 77

    Pregunta

    Asparagine → one-letter code

    Respuesta

    N

  78. Tarjeta 78

    Pregunta

    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?

    Respuesta

    Phenylalanine — side chain: Cα–CH₂–C₆H₅.

  79. Tarjeta 79

    Pregunta

    Lysine → three-letter code

    Respuesta

    Lys

  80. Tarjeta 80

    Pregunta

    Ala → amino-acid name

    Respuesta

    Alanine

  81. Tarjeta 81

    Pregunta

    Proline → one-letter code

    Respuesta

    P

  82. Tarjeta 82

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

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

  83. Tarjeta 83

    Pregunta

    Threonine → three-letter code

    Respuesta

    Thr

  84. Tarjeta 84

    Pregunta

    Gln → amino-acid name

    Respuesta

    Glutamine

  85. Tarjeta 85

    Pregunta

    W → amino-acid name

    Respuesta

    Tryptophan

  86. Tarjeta 86

    Pregunta

    Methionine → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–CH₂–CH₂–S–CH₃.

  87. Tarjeta 87

    Pregunta

    Glycine → one-letter code

    Respuesta

    G

  88. Tarjeta 88

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

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

  89. Tarjeta 89

    Pregunta

    Histidine → one-letter code

    Respuesta

    H

  90. Tarjeta 90

    Pregunta

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

    Which amino acid has this side chain?

    Respuesta

    Valine — side chain: Cα–CH(CH₃)₂.

  91. Tarjeta 91

    Pregunta

    Serine → three-letter code

    Respuesta

    Ser

  92. Tarjeta 92

    Pregunta

    Asn → amino-acid name

    Respuesta

    Asparagine

  93. Tarjeta 93

    Pregunta

    F → amino-acid name

    Respuesta

    Phenylalanine

  94. Tarjeta 94

    Pregunta

    Lysine → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–(CH₂)₄–NH₂.

  95. Tarjeta 95

    Pregunta

    Alanine → one-letter code

    Respuesta

    A

  96. Tarjeta 96

    Pregunta

    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?

    Respuesta

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

  97. Tarjeta 97

    Pregunta

    Cysteine → three-letter code

    Respuesta

    Cys

  98. Tarjeta 98

    Pregunta

    Asp → amino-acid name

    Respuesta

    Aspartate

  99. Tarjeta 99

    Pregunta

    Y → amino-acid name

    Respuesta

    Tyrosine

  100. Tarjeta 100

    Pregunta

    Arginine → draw or recall the side chain

    Respuesta

    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. Tarjeta 101

    Pregunta

    Ser → amino-acid name

    Respuesta

    Serine

  102. Tarjeta 102

    Pregunta

    N → amino-acid name

    Respuesta

    Asparagine

  103. Tarjeta 103

    Pregunta

    Phenylalanine → draw or recall the side chain

    Respuesta

    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. Tarjeta 104

    Pregunta

    Lys → amino-acid name

    Respuesta

    Lysine

  105. Tarjeta 105

    Pregunta

    A → amino-acid name

    Respuesta

    Alanine

  106. Tarjeta 106

    Pregunta

    Isoleucine → draw or recall the side chain

    Respuesta

    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. Tarjeta 107

    Pregunta

    Cys → amino-acid name

    Respuesta

    Cysteine

  108. Tarjeta 108

    Pregunta

    D → amino-acid name

    Respuesta

    Aspartate

  109. Tarjeta 109

    Pregunta

    Tyrosine → draw or recall the side chain

    Respuesta

    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. Tarjeta 110

    Pregunta

    Arg → amino-acid name

    Respuesta

    Arginine

  111. Tarjeta 111

    Pregunta

    P → amino-acid name

    Respuesta

    Proline

  112. Tarjeta 112

    Pregunta

    Leucine → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–CH₂–CH(CH₃)₂.

  113. Tarjeta 113

    Pregunta

    Thr → amino-acid name

    Respuesta

    Threonine

  114. Tarjeta 114

    Pregunta

    Q → amino-acid name

    Respuesta

    Glutamine

  115. Tarjeta 115

    Pregunta

    Tryptophan → draw or recall the side chain

    Respuesta

    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. Tarjeta 116

    Pregunta

    Met → amino-acid name

    Respuesta

    Methionine

  117. Tarjeta 117

    Pregunta

    G → amino-acid name

    Respuesta

    Glycine

  118. Tarjeta 118

    Pregunta

    Glutamate → draw or recall the side chain

    Respuesta

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

    Side chain: Cα–CH₂–CH₂–C(=O)–OH.

  119. Tarjeta 119

    Pregunta

    H → amino-acid name

    Respuesta

    Histidine

  120. Tarjeta 120

    Pregunta

    Valine → draw or recall the side chain

    Respuesta

    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.

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Amino Acid Flashcards: 20 Side-Chain Structures & Codes

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Flashcards se abrirá para que puedas empezar a estudiar.