# Amino Acid Flashcards: 20 Side\-Chain Structures & Codes

![Abstract molecular study scene with colorful ball\-and\-stick side\-chain forms arranged around an open center\.](<https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/a03b60fd2b9e8f984ae9a8f50ce304d34c33bb233c91e34e1350021551ea90eb>)

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](<https://nibomo.com/de/catalog/authors/flashcards-open-source-app/>)

[Mit diesem Lernkartenset kostenlos lernen](<https://app.nibomo.com/catalog/import/f8883ee1-e4a3-585f-92c6-5013dc3e8dbc>)

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## Details zum Lernkartenset

- Karten: 120 Karten
- Version: 2
- Veröffentlicht: 23. August 2026
- Zuletzt aktualisiert: 10. September 2026
- Lizenz: Common knowledge · CC0 1\.0
- Zielgruppensprachen: [en](<https://nibomo.com/de/catalog/languages/en/>)
- Fach: Biochemistry
- Tags: amino\-acids

## 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](https://publications.iupac.org/pac/1984/pdf/5605x0595.pdf), [NCBI’s overview of amino acids and their side chains](https://www.ncbi.nlm.nih.gov/books/NBK9879/), and the [NCBI amino-acid code table](https://www.ncbi.nlm.nih.gov/books/NBK44863/table/sequencesquickstart.Te/) 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.

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## Karten in diesem Lernkartenset

### Karte 1

**Frage**

![Side-chain diagram showing CH₂ joined to a five-membered ring containing NH and N from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/eefabd06571c635134e5a4bdf8720a03f4d71afd26513ac4ceca454739b8c981)

Which amino acid has this side chain?

**Antwort**

Histidine — side chain: `Cα–CH₂–imidazolyl`.

### Karte 2

**Frage**

Valine → three-letter code

**Antwort**

Val

### Karte 3

**Frage**

Serine → one-letter code

**Antwort**

S

### Karte 4

**Frage**

![Side-chain diagram showing CH₂–C(=O)–NH₂ from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/7e4ff407b91cf6f7820d813d72ac9da34b3669e2e6b58beb3a977d1b3506eb7b)

Which amino acid has this side chain?

**Antwort**

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

### Karte 5

**Frage**

Phenylalanine → three-letter code

**Antwort**

Phe

### Karte 6

**Frage**

Lysine → one-letter code

**Antwort**

K

### Karte 7

**Frage**

![Side-chain diagram showing one CH₃ group bonded to the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/29c4ab3ee392c9a6fc1c43f8983657e76ff3331be10caac184741edd951d8bc3)

Which amino acid has this side chain?

**Antwort**

Alanine — side chain: `Cα–CH₃`.

### Karte 8

**Frage**

Isoleucine → three-letter code

**Antwort**

Ile

### Karte 9

**Frage**

Cysteine → one-letter code

**Antwort**

C

### Karte 10

**Frage**

![Side-chain diagram showing CH₂–C(=O)–OH from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/be88622a40264d26e2d8dc797f44d0e1a4f12224271be505a2499d31a749f9ad)

Which amino acid has this side chain?

**Antwort**

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

### Karte 11

**Frage**

Tyrosine → three-letter code

**Antwort**

Tyr

### Karte 12

**Frage**

Arginine → one-letter code

**Antwort**

R

### Karte 13

**Frage**

![Side-chain diagram showing three CH₂ groups linking the Cα and Nα attachment markers.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/a3f29fdf48b892b242e70240ad16743680384fd24758e505ed40aec6f4ba98ee)

Which amino acid has this side chain?

**Antwort**

Proline — side chain: `Cα–(CH₂)₃–Nα`.

### Karte 14

**Frage**

Leucine → three-letter code

**Antwort**

Leu

### Karte 15

**Frage**

Threonine → one-letter code

**Antwort**

T

### Karte 16

**Frage**

![Side-chain diagram showing CH₂–CH₂–C(=O)–NH₂ from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/385280d384f44bbc79e29b3a6ea360e679bc5f1f9f259d9d46834f457b8b5e29)

Which amino acid has this side chain?

**Antwort**

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

### Karte 17

**Frage**

Tryptophan → three-letter code

**Antwort**

Trp

### Karte 18

**Frage**

Methionine → one-letter code

**Antwort**

M

### Karte 19

**Frage**

![Side-chain diagram showing a hydrogen bonded to the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/4892cd3bc24b272bb6c6abaa07f195c1c38db167a939bb747d2e9cc8fc23dfb7)

Which amino acid has this side chain?

**Antwort**

Glycine — side chain: `Cα–H`.

### Karte 20

**Frage**

Glutamate → three-letter code

**Antwort**

Glu

### Karte 21

**Frage**

Val → amino-acid name

**Antwort**

Valine

### Karte 22

**Frage**

S → amino-acid name

**Antwort**

Serine

### Karte 23

**Frage**

Asparagine → three-letter code

**Antwort**

Asn

### Karte 24

**Frage**

Phenylalanine → one-letter code

**Antwort**

F

### Karte 25

**Frage**

![Side-chain diagram showing (CH₂)₄–NH₂ from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/530eba43621eb2e1e2fca9eff878886dd05b4f894378fadfa5e7825133aa5f97)

Which amino acid has this side chain?

**Antwort**

Lysine — side chain: `Cα–(CH₂)₄–NH₂`.

### Karte 26

**Frage**

Alanine → draw or recall the side chain

**Antwort**

![Side-chain diagram showing one CH₃ group bonded to the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/29c4ab3ee392c9a6fc1c43f8983657e76ff3331be10caac184741edd951d8bc3)

Side chain: `Cα–CH₃`.

### Karte 27

**Frage**

Ile → amino-acid name

**Antwort**

Isoleucine

### Karte 28

**Frage**

C → amino-acid name

**Antwort**

Cysteine

### Karte 29

**Frage**

Aspartate → three-letter code

**Antwort**

Asp

### Karte 30

**Frage**

Tyrosine → one-letter code

**Antwort**

Y

### Karte 31

**Frage**

![Side-chain diagram showing (CH₂)₃–NH–C(=NH)–NH₂ from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/1a53b6a1a88e0030eab25a86b8914a34567d4b68184099d8c80f09b03a089b58)

Which amino acid has this side chain?

**Antwort**

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

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/a3f29fdf48b892b242e70240ad16743680384fd24758e505ed40aec6f4ba98ee)

Side chain: `Cα–(CH₂)₃–Nα`.

### Karte 33

**Frage**

Leu → amino-acid name

**Antwort**

Leucine

### Karte 34

**Frage**

T → amino-acid name

**Antwort**

Threonine

### Karte 35

**Frage**

Glutamine → three-letter code

**Antwort**

Gln

### Karte 36

**Frage**

Tryptophan → one-letter code

**Antwort**

W

### Karte 37

**Frage**

![Side-chain diagram showing CH₂–CH₂–S–CH₃ from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/c5ff2c00a9e3f1992771c19ae5356a41559d1473e18aa1362558e8c8f018c2b5)

Which amino acid has this side chain?

**Antwort**

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

### Karte 38

**Frage**

Glycine → draw or recall the side chain

**Antwort**

![Side-chain diagram showing a hydrogen bonded to the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/4892cd3bc24b272bb6c6abaa07f195c1c38db167a939bb747d2e9cc8fc23dfb7)

Side chain: `Cα–H`.

### Karte 39

**Frage**

Glu → amino-acid name

**Antwort**

Glutamate

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/eefabd06571c635134e5a4bdf8720a03f4d71afd26513ac4ceca454739b8c981)

Side chain: `Cα–CH₂–imidazolyl`.

### Karte 41

**Frage**

K → amino-acid name

**Antwort**

Lysine

### Karte 42

**Frage**

Alanine → three-letter code

**Antwort**

Ala

### Karte 43

**Frage**

Isoleucine → one-letter code

**Antwort**

I

### Karte 44

**Frage**

![Side-chain diagram showing CH₂–SH from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/4b49de29d947aea65a0314c45479865b341a7c0c55ba0bd71302bc8668f3034b)

Which amino acid has this side chain?

**Antwort**

Cysteine — side chain: `Cα–CH₂–SH`.

### Karte 45

**Frage**

Aspartate → draw or recall the side chain

**Antwort**

![Side-chain diagram showing CH₂–C(=O)–OH from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/be88622a40264d26e2d8dc797f44d0e1a4f12224271be505a2499d31a749f9ad)

Side chain: `Cα–CH₂–C(=O)–OH`.

### Karte 46

**Frage**

Tyr → amino-acid name

**Antwort**

Tyrosine

### Karte 47

**Frage**

R → amino-acid name

**Antwort**

Arginine

### Karte 48

**Frage**

Proline → three-letter code

**Antwort**

Pro

### Karte 49

**Frage**

Leucine → one-letter code

**Antwort**

L

### Karte 50

**Frage**

![Side-chain diagram showing CH bonded to OH and CH₃ from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/782e0535e46394f54efda2f2c9d23c0b157949c5606f29f689da55050825b8f5)

Which amino acid has this side chain?

**Antwort**

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

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/385280d384f44bbc79e29b3a6ea360e679bc5f1f9f259d9d46834f457b8b5e29)

Side chain: `Cα–CH₂–CH₂–C(=O)–NH₂`.

### Karte 52

**Frage**

Trp → amino-acid name

**Antwort**

Tryptophan

### Karte 53

**Frage**

M → amino-acid name

**Antwort**

Methionine

### Karte 54

**Frage**

Glycine → three-letter code

**Antwort**

Gly

### Karte 55

**Frage**

Glutamate → one-letter code

**Antwort**

E

### Karte 56

**Frage**

Histidine → three-letter code

**Antwort**

His

### Karte 57

**Frage**

Valine → one-letter code

**Antwort**

V

### Karte 58

**Frage**

![Side-chain diagram showing CH₂–OH from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/144e6bec9c9cad8583515a9c036caf4b2e983c00c704b3c67c10f303a87237eb)

Which amino acid has this side chain?

**Antwort**

Serine — side chain: `Cα–CH₂–OH`.

### Karte 59

**Frage**

Asparagine → draw or recall the side chain

**Antwort**

![Side-chain diagram showing CH₂–C(=O)–NH₂ from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/7e4ff407b91cf6f7820d813d72ac9da34b3669e2e6b58beb3a977d1b3506eb7b)

Side chain: `Cα–CH₂–C(=O)–NH₂`.

### Karte 60

**Frage**

Phe → amino-acid name

**Antwort**

Phenylalanine

### Karte 61

**Frage**

I → amino-acid name

**Antwort**

Isoleucine

### Karte 62

**Frage**

Cysteine → draw or recall the side chain

**Antwort**

![Side-chain diagram showing CH₂–SH from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/4b49de29d947aea65a0314c45479865b341a7c0c55ba0bd71302bc8668f3034b)

Side chain: `Cα–CH₂–SH`.

### Karte 63

**Frage**

Aspartate → one-letter code

**Antwort**

D

### Karte 64

**Frage**

![Side-chain diagram showing CH₂ joined to a six-membered ring with an opposite OH group from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/8200cf8a37c2f9ce228a57faff599f4cb303fdb08ab0b33a0a2f2ccff602219a)

Which amino acid has this side chain?

**Antwort**

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

### Karte 65

**Frage**

Arginine → three-letter code

**Antwort**

Arg

### Karte 66

**Frage**

Pro → amino-acid name

**Antwort**

Proline

### Karte 67

**Frage**

L → amino-acid name

**Antwort**

Leucine

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/782e0535e46394f54efda2f2c9d23c0b157949c5606f29f689da55050825b8f5)

Side chain: `Cα–CH(OH)–CH₃`.

### Karte 69

**Frage**

Glutamine → one-letter code

**Antwort**

Q

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/4d669a96569d46dd38fa54d4a7e6b17b47aa8e2684351622b1f0f6294be99026)

Which amino acid has this side chain?

**Antwort**

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

### Karte 71

**Frage**

Methionine → three-letter code

**Antwort**

Met

### Karte 72

**Frage**

Gly → amino-acid name

**Antwort**

Glycine

### Karte 73

**Frage**

E → amino-acid name

**Antwort**

Glutamate

### Karte 74

**Frage**

His → amino-acid name

**Antwort**

Histidine

### Karte 75

**Frage**

V → amino-acid name

**Antwort**

Valine

### Karte 76

**Frage**

Serine → draw or recall the side chain

**Antwort**

![Side-chain diagram showing CH₂–OH from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/144e6bec9c9cad8583515a9c036caf4b2e983c00c704b3c67c10f303a87237eb)

Side chain: `Cα–CH₂–OH`.

### Karte 77

**Frage**

Asparagine → one-letter code

**Antwort**

N

### Karte 78

**Frage**

![Side-chain diagram showing CH₂ joined to a six-membered ring with alternating double bonds from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/fb7661413ef90aae3b37d64324775aaa530fcc9b970f60eb09b2b2df6c07bd6e)

Which amino acid has this side chain?

**Antwort**

Phenylalanine — side chain: `Cα–CH₂–C₆H₅`.

### Karte 79

**Frage**

Lysine → three-letter code

**Antwort**

Lys

### Karte 80

**Frage**

Ala → amino-acid name

**Antwort**

Alanine

### Karte 81

**Frage**

Proline → one-letter code

**Antwort**

P

### Karte 82

**Frage**

![Side-chain diagram showing CH₂–CH with two terminal CH₃ branches from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/6cd3680e4bf0d5f0756853d6d44e27787efa78323e20bf3160810420e628e65a)

Which amino acid has this side chain?

**Antwort**

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

### Karte 83

**Frage**

Threonine → three-letter code

**Antwort**

Thr

### Karte 84

**Frage**

Gln → amino-acid name

**Antwort**

Glutamine

### Karte 85

**Frage**

W → amino-acid name

**Antwort**

Tryptophan

### Karte 86

**Frage**

Methionine → draw or recall the side chain

**Antwort**

![Side-chain diagram showing CH₂–CH₂–S–CH₃ from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/c5ff2c00a9e3f1992771c19ae5356a41559d1473e18aa1362558e8c8f018c2b5)

Side chain: `Cα–CH₂–CH₂–S–CH₃`.

### Karte 87

**Frage**

Glycine → one-letter code

**Antwort**

G

### Karte 88

**Frage**

![Side-chain diagram showing CH₂–CH₂–C(=O)–OH from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/af8a07174a336305006d33c313d4cfbd919f3313d49c2c8cbaa7869cc6dcbeb4)

Which amino acid has this side chain?

**Antwort**

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

### Karte 89

**Frage**

Histidine → one-letter code

**Antwort**

H

### Karte 90

**Frage**

![Side-chain diagram showing CH bonded to two CH₃ branches from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/e1cd6292708b8c43ebe62b2b505a3b7a5a75a2d451ff4a7a789108aeb114c7b0)

Which amino acid has this side chain?

**Antwort**

Valine — side chain: `Cα–CH(CH₃)₂`.

### Karte 91

**Frage**

Serine → three-letter code

**Antwort**

Ser

### Karte 92

**Frage**

Asn → amino-acid name

**Antwort**

Asparagine

### Karte 93

**Frage**

F → amino-acid name

**Antwort**

Phenylalanine

### Karte 94

**Frage**

Lysine → draw or recall the side chain

**Antwort**

![Side-chain diagram showing (CH₂)₄–NH₂ from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/530eba43621eb2e1e2fca9eff878886dd05b4f894378fadfa5e7825133aa5f97)

Side chain: `Cα–(CH₂)₄–NH₂`.

### Karte 95

**Frage**

Alanine → one-letter code

**Antwort**

A

### Karte 96

**Frage**

![Side-chain diagram showing CH with one CH₃ branch and one CH₂–CH₃ branch from the Cα attachment marker.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/7fab626b620475c432dc1218f0b812c51159a18ffbc3dbd7c5a7877ac3aa753f)

Which amino acid has this side chain?

**Antwort**

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

### Karte 97

**Frage**

Cysteine → three-letter code

**Antwort**

Cys

### Karte 98

**Frage**

Asp → amino-acid name

**Antwort**

Aspartate

### Karte 99

**Frage**

Y → amino-acid name

**Antwort**

Tyrosine

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/1a53b6a1a88e0030eab25a86b8914a34567d4b68184099d8c80f09b03a089b58)

Side chain: `Cα–(CH₂)₃–NH–C(=NH)–NH₂`.

### Karte 101

**Frage**

Ser → amino-acid name

**Antwort**

Serine

### Karte 102

**Frage**

N → amino-acid name

**Antwort**

Asparagine

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/fb7661413ef90aae3b37d64324775aaa530fcc9b970f60eb09b2b2df6c07bd6e)

Side chain: `Cα–CH₂–C₆H₅`.

### Karte 104

**Frage**

Lys → amino-acid name

**Antwort**

Lysine

### Karte 105

**Frage**

A → amino-acid name

**Antwort**

Alanine

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/7fab626b620475c432dc1218f0b812c51159a18ffbc3dbd7c5a7877ac3aa753f)

Side chain: `Cα–CH(CH₃)–CH₂–CH₃`.

### Karte 107

**Frage**

Cys → amino-acid name

**Antwort**

Cysteine

### Karte 108

**Frage**

D → amino-acid name

**Antwort**

Aspartate

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/8200cf8a37c2f9ce228a57faff599f4cb303fdb08ab0b33a0a2f2ccff602219a)

Side chain: `Cα–CH₂–C₆H₄–OH (para)`.

### Karte 110

**Frage**

Arg → amino-acid name

**Antwort**

Arginine

### Karte 111

**Frage**

P → amino-acid name

**Antwort**

Proline

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/6cd3680e4bf0d5f0756853d6d44e27787efa78323e20bf3160810420e628e65a)

Side chain: `Cα–CH₂–CH(CH₃)₂`.

### Karte 113

**Frage**

Thr → amino-acid name

**Antwort**

Threonine

### Karte 114

**Frage**

Q → amino-acid name

**Antwort**

Glutamine

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/4d669a96569d46dd38fa54d4a7e6b17b47aa8e2684351622b1f0f6294be99026)

Side chain: `Cα–CH₂–indol-3-yl`.

### Karte 116

**Frage**

Met → amino-acid name

**Antwort**

Methionine

### Karte 117

**Frage**

G → amino-acid name

**Antwort**

Glycine

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/af8a07174a336305006d33c313d4cfbd919f3313d49c2c8cbaa7869cc6dcbeb4)

Side chain: `Cα–CH₂–CH₂–C(=O)–OH`.

### Karte 119

**Frage**

H → amino-acid name

**Antwort**

Histidine

### 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.](https://d2bq3tvt7zf1kf.cloudfront.net/catalog/media/e1cd6292708b8c43ebe62b2b505a3b7a5a75a2d451ff4a7a789108aeb114c7b0)

Side chain: `Cα–CH(CH₃)₂`.

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