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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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Sobre aquesta baralla

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.

Targetes d'aquesta baralla

  1. Targeta 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?

    Resposta

    Histidine — side chain: Cα–CH₂–imidazolyl.

  2. Targeta 2

    Pregunta

    Valine → three-letter code

    Resposta

    Val

  3. Targeta 3

    Pregunta

    Serine → one-letter code

    Resposta

    S

  4. Targeta 4

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

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

  5. Targeta 5

    Pregunta

    Phenylalanine → three-letter code

    Resposta

    Phe

  6. Targeta 6

    Pregunta

    Lysine → one-letter code

    Resposta

    K

  7. Targeta 7

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

    Alanine — side chain: Cα–CH₃.

  8. Targeta 8

    Pregunta

    Isoleucine → three-letter code

    Resposta

    Ile

  9. Targeta 9

    Pregunta

    Cysteine → one-letter code

    Resposta

    C

  10. Targeta 10

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

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

  11. Targeta 11

    Pregunta

    Tyrosine → three-letter code

    Resposta

    Tyr

  12. Targeta 12

    Pregunta

    Arginine → one-letter code

    Resposta

    R

  13. Targeta 13

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

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

  14. Targeta 14

    Pregunta

    Leucine → three-letter code

    Resposta

    Leu

  15. Targeta 15

    Pregunta

    Threonine → one-letter code

    Resposta

    T

  16. Targeta 16

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

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

  17. Targeta 17

    Pregunta

    Tryptophan → three-letter code

    Resposta

    Trp

  18. Targeta 18

    Pregunta

    Methionine → one-letter code

    Resposta

    M

  19. Targeta 19

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

    Glycine — side chain: Cα–H.

  20. Targeta 20

    Pregunta

    Glutamate → three-letter code

    Resposta

    Glu

  21. Targeta 21

    Pregunta

    Val → amino-acid name

    Resposta

    Valine

  22. Targeta 22

    Pregunta

    S → amino-acid name

    Resposta

    Serine

  23. Targeta 23

    Pregunta

    Asparagine → three-letter code

    Resposta

    Asn

  24. Targeta 24

    Pregunta

    Phenylalanine → one-letter code

    Resposta

    F

  25. Targeta 25

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

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

  26. Targeta 26

    Pregunta

    Alanine → draw or recall the side chain

    Resposta

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

    Side chain: Cα–CH₃.

  27. Targeta 27

    Pregunta

    Ile → amino-acid name

    Resposta

    Isoleucine

  28. Targeta 28

    Pregunta

    C → amino-acid name

    Resposta

    Cysteine

  29. Targeta 29

    Pregunta

    Aspartate → three-letter code

    Resposta

    Asp

  30. Targeta 30

    Pregunta

    Tyrosine → one-letter code

    Resposta

    Y

  31. Targeta 31

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

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

  32. Targeta 32

    Pregunta

    Proline → draw or recall the side chain

    Resposta

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

    Side chain: Cα–(CH₂)₃–Nα.

  33. Targeta 33

    Pregunta

    Leu → amino-acid name

    Resposta

    Leucine

  34. Targeta 34

    Pregunta

    T → amino-acid name

    Resposta

    Threonine

  35. Targeta 35

    Pregunta

    Glutamine → three-letter code

    Resposta

    Gln

  36. Targeta 36

    Pregunta

    Tryptophan → one-letter code

    Resposta

    W

  37. Targeta 37

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

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

  38. Targeta 38

    Pregunta

    Glycine → draw or recall the side chain

    Resposta

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

    Side chain: Cα–H.

  39. Targeta 39

    Pregunta

    Glu → amino-acid name

    Resposta

    Glutamate

  40. Targeta 40

    Pregunta

    Histidine → draw or recall the side chain

    Resposta

    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. Targeta 41

    Pregunta

    K → amino-acid name

    Resposta

    Lysine

  42. Targeta 42

    Pregunta

    Alanine → three-letter code

    Resposta

    Ala

  43. Targeta 43

    Pregunta

    Isoleucine → one-letter code

    Resposta

    I

  44. Targeta 44

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

    Cysteine — side chain: Cα–CH₂–SH.

  45. Targeta 45

    Pregunta

    Aspartate → draw or recall the side chain

    Resposta

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

    Side chain: Cα–CH₂–C(=O)–OH.

  46. Targeta 46

    Pregunta

    Tyr → amino-acid name

    Resposta

    Tyrosine

  47. Targeta 47

    Pregunta

    R → amino-acid name

    Resposta

    Arginine

  48. Targeta 48

    Pregunta

    Proline → three-letter code

    Resposta

    Pro

  49. Targeta 49

    Pregunta

    Leucine → one-letter code

    Resposta

    L

  50. Targeta 50

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

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

  51. Targeta 51

    Pregunta

    Glutamine → draw or recall the side chain

    Resposta

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

    Side chain: Cα–CH₂–CH₂–C(=O)–NH₂.

  52. Targeta 52

    Pregunta

    Trp → amino-acid name

    Resposta

    Tryptophan

  53. Targeta 53

    Pregunta

    M → amino-acid name

    Resposta

    Methionine

  54. Targeta 54

    Pregunta

    Glycine → three-letter code

    Resposta

    Gly

  55. Targeta 55

    Pregunta

    Glutamate → one-letter code

    Resposta

    E

  56. Targeta 56

    Pregunta

    Histidine → three-letter code

    Resposta

    His

  57. Targeta 57

    Pregunta

    Valine → one-letter code

    Resposta

    V

  58. Targeta 58

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

    Serine — side chain: Cα–CH₂–OH.

  59. Targeta 59

    Pregunta

    Asparagine → draw or recall the side chain

    Resposta

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

    Side chain: Cα–CH₂–C(=O)–NH₂.

  60. Targeta 60

    Pregunta

    Phe → amino-acid name

    Resposta

    Phenylalanine

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

    120 targetes

    Amino Acid Flashcards: 20 Side-Chain Structures & Codes

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  61. Targeta 61

    Pregunta

    I → amino-acid name

    Resposta

    Isoleucine

  62. Targeta 62

    Pregunta

    Cysteine → draw or recall the side chain

    Resposta

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

    Side chain: Cα–CH₂–SH.

  63. Targeta 63

    Pregunta

    Aspartate → one-letter code

    Resposta

    D

  64. Targeta 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?

    Resposta

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

  65. Targeta 65

    Pregunta

    Arginine → three-letter code

    Resposta

    Arg

  66. Targeta 66

    Pregunta

    Pro → amino-acid name

    Resposta

    Proline

  67. Targeta 67

    Pregunta

    L → amino-acid name

    Resposta

    Leucine

  68. Targeta 68

    Pregunta

    Threonine → draw or recall the side chain

    Resposta

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

    Side chain: Cα–CH(OH)–CH₃.

  69. Targeta 69

    Pregunta

    Glutamine → one-letter code

    Resposta

    Q

  70. Targeta 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?

    Resposta

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

  71. Targeta 71

    Pregunta

    Methionine → three-letter code

    Resposta

    Met

  72. Targeta 72

    Pregunta

    Gly → amino-acid name

    Resposta

    Glycine

  73. Targeta 73

    Pregunta

    E → amino-acid name

    Resposta

    Glutamate

  74. Targeta 74

    Pregunta

    His → amino-acid name

    Resposta

    Histidine

  75. Targeta 75

    Pregunta

    V → amino-acid name

    Resposta

    Valine

  76. Targeta 76

    Pregunta

    Serine → draw or recall the side chain

    Resposta

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

    Side chain: Cα–CH₂–OH.

  77. Targeta 77

    Pregunta

    Asparagine → one-letter code

    Resposta

    N

  78. Targeta 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?

    Resposta

    Phenylalanine — side chain: Cα–CH₂–C₆H₅.

  79. Targeta 79

    Pregunta

    Lysine → three-letter code

    Resposta

    Lys

  80. Targeta 80

    Pregunta

    Ala → amino-acid name

    Resposta

    Alanine

  81. Targeta 81

    Pregunta

    Proline → one-letter code

    Resposta

    P

  82. Targeta 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?

    Resposta

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

  83. Targeta 83

    Pregunta

    Threonine → three-letter code

    Resposta

    Thr

  84. Targeta 84

    Pregunta

    Gln → amino-acid name

    Resposta

    Glutamine

  85. Targeta 85

    Pregunta

    W → amino-acid name

    Resposta

    Tryptophan

  86. Targeta 86

    Pregunta

    Methionine → draw or recall the side chain

    Resposta

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

    Side chain: Cα–CH₂–CH₂–S–CH₃.

  87. Targeta 87

    Pregunta

    Glycine → one-letter code

    Resposta

    G

  88. Targeta 88

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

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

  89. Targeta 89

    Pregunta

    Histidine → one-letter code

    Resposta

    H

  90. Targeta 90

    Pregunta

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

    Which amino acid has this side chain?

    Resposta

    Valine — side chain: Cα–CH(CH₃)₂.

  91. Targeta 91

    Pregunta

    Serine → three-letter code

    Resposta

    Ser

  92. Targeta 92

    Pregunta

    Asn → amino-acid name

    Resposta

    Asparagine

  93. Targeta 93

    Pregunta

    F → amino-acid name

    Resposta

    Phenylalanine

  94. Targeta 94

    Pregunta

    Lysine → draw or recall the side chain

    Resposta

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

    Side chain: Cα–(CH₂)₄–NH₂.

  95. Targeta 95

    Pregunta

    Alanine → one-letter code

    Resposta

    A

  96. Targeta 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?

    Resposta

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

  97. Targeta 97

    Pregunta

    Cysteine → three-letter code

    Resposta

    Cys

  98. Targeta 98

    Pregunta

    Asp → amino-acid name

    Resposta

    Aspartate

  99. Targeta 99

    Pregunta

    Y → amino-acid name

    Resposta

    Tyrosine

  100. Targeta 100

    Pregunta

    Arginine → draw or recall the side chain

    Resposta

    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. Targeta 101

    Pregunta

    Ser → amino-acid name

    Resposta

    Serine

  102. Targeta 102

    Pregunta

    N → amino-acid name

    Resposta

    Asparagine

  103. Targeta 103

    Pregunta

    Phenylalanine → draw or recall the side chain

    Resposta

    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. Targeta 104

    Pregunta

    Lys → amino-acid name

    Resposta

    Lysine

  105. Targeta 105

    Pregunta

    A → amino-acid name

    Resposta

    Alanine

  106. Targeta 106

    Pregunta

    Isoleucine → draw or recall the side chain

    Resposta

    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. Targeta 107

    Pregunta

    Cys → amino-acid name

    Resposta

    Cysteine

  108. Targeta 108

    Pregunta

    D → amino-acid name

    Resposta

    Aspartate

  109. Targeta 109

    Pregunta

    Tyrosine → draw or recall the side chain

    Resposta

    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. Targeta 110

    Pregunta

    Arg → amino-acid name

    Resposta

    Arginine

  111. Targeta 111

    Pregunta

    P → amino-acid name

    Resposta

    Proline

  112. Targeta 112

    Pregunta

    Leucine → draw or recall the side chain

    Resposta

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

    Side chain: Cα–CH₂–CH(CH₃)₂.

  113. Targeta 113

    Pregunta

    Thr → amino-acid name

    Resposta

    Threonine

  114. Targeta 114

    Pregunta

    Q → amino-acid name

    Resposta

    Glutamine

  115. Targeta 115

    Pregunta

    Tryptophan → draw or recall the side chain

    Resposta

    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. Targeta 116

    Pregunta

    Met → amino-acid name

    Resposta

    Methionine

  117. Targeta 117

    Pregunta

    G → amino-acid name

    Resposta

    Glycine

  118. Targeta 118

    Pregunta

    Glutamate → draw or recall the side chain

    Resposta

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

    Side chain: Cα–CH₂–CH₂–C(=O)–OH.

  119. Targeta 119

    Pregunta

    H → amino-acid name

    Resposta

    Histidine

  120. Targeta 120

    Pregunta

    Valine → draw or recall the side chain

    Resposta

    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 targetes

Amino Acid Flashcards: 20 Side-Chain Structures & Codes

Estudia aquesta baralla de franc

Nibomo s'obre perquè puguis començar a estudiar.