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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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اس ڈیک کے بارے میں

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.

اس ڈیک کے کارڈز

  1. کارڈ 1

    سوال

    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?

    جواب

    Histidine — side chain: Cα–CH₂–imidazolyl.

  2. کارڈ 2

    سوال

    Valine → three-letter code

    جواب

    Val

  3. کارڈ 3

    سوال

    Serine → one-letter code

    جواب

    S

  4. کارڈ 4

    سوال

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

    Which amino acid has this side chain?

    جواب

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

  5. کارڈ 5

    سوال

    Phenylalanine → three-letter code

    جواب

    Phe

  6. کارڈ 6

    سوال

    Lysine → one-letter code

    جواب

    K

  7. کارڈ 7

    سوال

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

    Which amino acid has this side chain?

    جواب

    Alanine — side chain: Cα–CH₃.

  8. کارڈ 8

    سوال

    Isoleucine → three-letter code

    جواب

    Ile

  9. کارڈ 9

    سوال

    Cysteine → one-letter code

    جواب

    C

  10. کارڈ 10

    سوال

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

    Which amino acid has this side chain?

    جواب

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

  11. کارڈ 11

    سوال

    Tyrosine → three-letter code

    جواب

    Tyr

  12. کارڈ 12

    سوال

    Arginine → one-letter code

    جواب

    R

  13. کارڈ 13

    سوال

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

    Which amino acid has this side chain?

    جواب

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

  14. کارڈ 14

    سوال

    Leucine → three-letter code

    جواب

    Leu

  15. کارڈ 15

    سوال

    Threonine → one-letter code

    جواب

    T

  16. کارڈ 16

    سوال

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

    Which amino acid has this side chain?

    جواب

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

  17. کارڈ 17

    سوال

    Tryptophan → three-letter code

    جواب

    Trp

  18. کارڈ 18

    سوال

    Methionine → one-letter code

    جواب

    M

  19. کارڈ 19

    سوال

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

    Which amino acid has this side chain?

    جواب

    Glycine — side chain: Cα–H.

  20. کارڈ 20

    سوال

    Glutamate → three-letter code

    جواب

    Glu

  21. کارڈ 21

    سوال

    Val → amino-acid name

    جواب

    Valine

  22. کارڈ 22

    سوال

    S → amino-acid name

    جواب

    Serine

  23. کارڈ 23

    سوال

    Asparagine → three-letter code

    جواب

    Asn

  24. کارڈ 24

    سوال

    Phenylalanine → one-letter code

    جواب

    F

  25. کارڈ 25

    سوال

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

    Which amino acid has this side chain?

    جواب

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

  26. کارڈ 26

    سوال

    Alanine → draw or recall the side chain

    جواب

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

    Side chain: Cα–CH₃.

  27. کارڈ 27

    سوال

    Ile → amino-acid name

    جواب

    Isoleucine

  28. کارڈ 28

    سوال

    C → amino-acid name

    جواب

    Cysteine

  29. کارڈ 29

    سوال

    Aspartate → three-letter code

    جواب

    Asp

  30. کارڈ 30

    سوال

    Tyrosine → one-letter code

    جواب

    Y

  31. کارڈ 31

    سوال

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

    Which amino acid has this side chain?

    جواب

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

  32. کارڈ 32

    سوال

    Proline → draw or recall the side chain

    جواب

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

    Side chain: Cα–(CH₂)₃–Nα.

  33. کارڈ 33

    سوال

    Leu → amino-acid name

    جواب

    Leucine

  34. کارڈ 34

    سوال

    T → amino-acid name

    جواب

    Threonine

  35. کارڈ 35

    سوال

    Glutamine → three-letter code

    جواب

    Gln

  36. کارڈ 36

    سوال

    Tryptophan → one-letter code

    جواب

    W

  37. کارڈ 37

    سوال

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

    Which amino acid has this side chain?

    جواب

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

  38. کارڈ 38

    سوال

    Glycine → draw or recall the side chain

    جواب

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

    Side chain: Cα–H.

  39. کارڈ 39

    سوال

    Glu → amino-acid name

    جواب

    Glutamate

  40. کارڈ 40

    سوال

    Histidine → draw or recall the side chain

    جواب

    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. کارڈ 41

    سوال

    K → amino-acid name

    جواب

    Lysine

  42. کارڈ 42

    سوال

    Alanine → three-letter code

    جواب

    Ala

  43. کارڈ 43

    سوال

    Isoleucine → one-letter code

    جواب

    I

  44. کارڈ 44

    سوال

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

    Which amino acid has this side chain?

    جواب

    Cysteine — side chain: Cα–CH₂–SH.

  45. کارڈ 45

    سوال

    Aspartate → draw or recall the side chain

    جواب

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

    Side chain: Cα–CH₂–C(=O)–OH.

  46. کارڈ 46

    سوال

    Tyr → amino-acid name

    جواب

    Tyrosine

  47. کارڈ 47

    سوال

    R → amino-acid name

    جواب

    Arginine

  48. کارڈ 48

    سوال

    Proline → three-letter code

    جواب

    Pro

  49. کارڈ 49

    سوال

    Leucine → one-letter code

    جواب

    L

  50. کارڈ 50

    سوال

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

    Which amino acid has this side chain?

    جواب

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

  51. کارڈ 51

    سوال

    Glutamine → draw or recall the side chain

    جواب

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

    Side chain: Cα–CH₂–CH₂–C(=O)–NH₂.

  52. کارڈ 52

    سوال

    Trp → amino-acid name

    جواب

    Tryptophan

  53. کارڈ 53

    سوال

    M → amino-acid name

    جواب

    Methionine

  54. کارڈ 54

    سوال

    Glycine → three-letter code

    جواب

    Gly

  55. کارڈ 55

    سوال

    Glutamate → one-letter code

    جواب

    E

  56. کارڈ 56

    سوال

    Histidine → three-letter code

    جواب

    His

  57. کارڈ 57

    سوال

    Valine → one-letter code

    جواب

    V

  58. کارڈ 58

    سوال

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

    Which amino acid has this side chain?

    جواب

    Serine — side chain: Cα–CH₂–OH.

  59. کارڈ 59

    سوال

    Asparagine → draw or recall the side chain

    جواب

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

    Side chain: Cα–CH₂–C(=O)–NH₂.

  60. کارڈ 60

    سوال

    Phe → amino-acid name

    جواب

    Phenylalanine

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

    120 کارڈز

    Amino Acid Flashcards: 20 Side-Chain Structures & Codes

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  61. کارڈ 61

    سوال

    I → amino-acid name

    جواب

    Isoleucine

  62. کارڈ 62

    سوال

    Cysteine → draw or recall the side chain

    جواب

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

    Side chain: Cα–CH₂–SH.

  63. کارڈ 63

    سوال

    Aspartate → one-letter code

    جواب

    D

  64. کارڈ 64

    سوال

    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?

    جواب

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

  65. کارڈ 65

    سوال

    Arginine → three-letter code

    جواب

    Arg

  66. کارڈ 66

    سوال

    Pro → amino-acid name

    جواب

    Proline

  67. کارڈ 67

    سوال

    L → amino-acid name

    جواب

    Leucine

  68. کارڈ 68

    سوال

    Threonine → draw or recall the side chain

    جواب

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

    Side chain: Cα–CH(OH)–CH₃.

  69. کارڈ 69

    سوال

    Glutamine → one-letter code

    جواب

    Q

  70. کارڈ 70

    سوال

    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?

    جواب

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

  71. کارڈ 71

    سوال

    Methionine → three-letter code

    جواب

    Met

  72. کارڈ 72

    سوال

    Gly → amino-acid name

    جواب

    Glycine

  73. کارڈ 73

    سوال

    E → amino-acid name

    جواب

    Glutamate

  74. کارڈ 74

    سوال

    His → amino-acid name

    جواب

    Histidine

  75. کارڈ 75

    سوال

    V → amino-acid name

    جواب

    Valine

  76. کارڈ 76

    سوال

    Serine → draw or recall the side chain

    جواب

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

    Side chain: Cα–CH₂–OH.

  77. کارڈ 77

    سوال

    Asparagine → one-letter code

    جواب

    N

  78. کارڈ 78

    سوال

    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?

    جواب

    Phenylalanine — side chain: Cα–CH₂–C₆H₅.

  79. کارڈ 79

    سوال

    Lysine → three-letter code

    جواب

    Lys

  80. کارڈ 80

    سوال

    Ala → amino-acid name

    جواب

    Alanine

  81. کارڈ 81

    سوال

    Proline → one-letter code

    جواب

    P

  82. کارڈ 82

    سوال

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

    Which amino acid has this side chain?

    جواب

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

  83. کارڈ 83

    سوال

    Threonine → three-letter code

    جواب

    Thr

  84. کارڈ 84

    سوال

    Gln → amino-acid name

    جواب

    Glutamine

  85. کارڈ 85

    سوال

    W → amino-acid name

    جواب

    Tryptophan

  86. کارڈ 86

    سوال

    Methionine → draw or recall the side chain

    جواب

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

    Side chain: Cα–CH₂–CH₂–S–CH₃.

  87. کارڈ 87

    سوال

    Glycine → one-letter code

    جواب

    G

  88. کارڈ 88

    سوال

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

    Which amino acid has this side chain?

    جواب

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

  89. کارڈ 89

    سوال

    Histidine → one-letter code

    جواب

    H

  90. کارڈ 90

    سوال

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

    Which amino acid has this side chain?

    جواب

    Valine — side chain: Cα–CH(CH₃)₂.

  91. کارڈ 91

    سوال

    Serine → three-letter code

    جواب

    Ser

  92. کارڈ 92

    سوال

    Asn → amino-acid name

    جواب

    Asparagine

  93. کارڈ 93

    سوال

    F → amino-acid name

    جواب

    Phenylalanine

  94. کارڈ 94

    سوال

    Lysine → draw or recall the side chain

    جواب

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

    Side chain: Cα–(CH₂)₄–NH₂.

  95. کارڈ 95

    سوال

    Alanine → one-letter code

    جواب

    A

  96. کارڈ 96

    سوال

    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?

    جواب

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

  97. کارڈ 97

    سوال

    Cysteine → three-letter code

    جواب

    Cys

  98. کارڈ 98

    سوال

    Asp → amino-acid name

    جواب

    Aspartate

  99. کارڈ 99

    سوال

    Y → amino-acid name

    جواب

    Tyrosine

  100. کارڈ 100

    سوال

    Arginine → draw or recall the side chain

    جواب

    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. کارڈ 101

    سوال

    Ser → amino-acid name

    جواب

    Serine

  102. کارڈ 102

    سوال

    N → amino-acid name

    جواب

    Asparagine

  103. کارڈ 103

    سوال

    Phenylalanine → draw or recall the side chain

    جواب

    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. کارڈ 104

    سوال

    Lys → amino-acid name

    جواب

    Lysine

  105. کارڈ 105

    سوال

    A → amino-acid name

    جواب

    Alanine

  106. کارڈ 106

    سوال

    Isoleucine → draw or recall the side chain

    جواب

    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. کارڈ 107

    سوال

    Cys → amino-acid name

    جواب

    Cysteine

  108. کارڈ 108

    سوال

    D → amino-acid name

    جواب

    Aspartate

  109. کارڈ 109

    سوال

    Tyrosine → draw or recall the side chain

    جواب

    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. کارڈ 110

    سوال

    Arg → amino-acid name

    جواب

    Arginine

  111. کارڈ 111

    سوال

    P → amino-acid name

    جواب

    Proline

  112. کارڈ 112

    سوال

    Leucine → draw or recall the side chain

    جواب

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

    Side chain: Cα–CH₂–CH(CH₃)₂.

  113. کارڈ 113

    سوال

    Thr → amino-acid name

    جواب

    Threonine

  114. کارڈ 114

    سوال

    Q → amino-acid name

    جواب

    Glutamine

  115. کارڈ 115

    سوال

    Tryptophan → draw or recall the side chain

    جواب

    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. کارڈ 116

    سوال

    Met → amino-acid name

    جواب

    Methionine

  117. کارڈ 117

    سوال

    G → amino-acid name

    جواب

    Glycine

  118. کارڈ 118

    سوال

    Glutamate → draw or recall the side chain

    جواب

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

    Side chain: Cα–CH₂–CH₂–C(=O)–OH.

  119. کارڈ 119

    سوال

    H → amino-acid name

    جواب

    Histidine

  120. کارڈ 120

    سوال

    Valine → draw or recall the side chain

    جواب

    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 کارڈز

Amino Acid Flashcards: 20 Side-Chain Structures & Codes

یہ ڈیک مفت پڑھیں

مطالعہ شروع کرنے کے لیے Nibomo کھلے گا۔