the alphabet

Twenty letters

Every sequence in this index is written in the same twenty-letter alphabet. Colour is side-chain chemistry throughout the site — this is the key, and the bars show how often each residue actually appears across all 62 indexed sequences.

AAla

Alanine hydrophobic

hydropathy: +1.8
charge: 0
residue mass: 71.1 Da

66 in the index · 5.7%

RArg

Arginine positive

hydropathy: -4.5
charge: +1
residue mass: 156.2 Da

76 in the index · 6.6%

NAsn

Asparagine polar

hydropathy: -3.5
charge: 0
residue mass: 114.1 Da

46 in the index · 4.0%

DAsp

Aspartic acid negative

hydropathy: -3.5
charge: −1
residue mass: 115.1 Da

53 in the index · 4.6%

CCys

Cysteine cysteine

hydropathy: +2.5
charge: 0
residue mass: 103.1 Da

31 in the index · 2.7%

EGlu

Glutamic acid negative

hydropathy: -3.5
charge: −1
residue mass: 129.1 Da

67 in the index · 5.8%

QGln

Glutamine polar

hydropathy: -3.5
charge: 0
residue mass: 128.1 Da

56 in the index · 4.9%

GGly

Glycine glycine

hydropathy: -0.4
charge: 0
residue mass: 57.1 Da

102 in the index · 8.9%

HHis

Histidine positive

hydropathy: -3.2
charge: 0
residue mass: 137.1 Da

29 in the index · 2.5%

IIle

Isoleucine hydrophobic

hydropathy: +4.5
charge: 0
residue mass: 113.2 Da

50 in the index · 4.3%

LLeu

Leucine hydrophobic

hydropathy: +3.8
charge: 0
residue mass: 113.2 Da

93 in the index · 8.1%

KLys

Lysine positive

hydropathy: -3.9
charge: +1
residue mass: 128.2 Da

90 in the index · 7.8%

MMet

Methionine hydrophobic

hydropathy: +1.9
charge: 0
residue mass: 131.2 Da

24 in the index · 2.1%

FPhe

Phenylalanine aromatic

hydropathy: +2.8
charge: 0
residue mass: 147.2 Da

57 in the index · 4.9%

PPro

Proline proline

hydropathy: -1.6
charge: 0
residue mass: 97.1 Da

57 in the index · 4.9%

SSer

Serine polar

hydropathy: -0.8
charge: 0
residue mass: 87.1 Da

95 in the index · 8.2%

TThr

Threonine polar

hydropathy: -0.7
charge: 0
residue mass: 101.1 Da

59 in the index · 5.1%

WTrp

Tryptophan aromatic

hydropathy: -0.9
charge: 0
residue mass: 186.2 Da

20 in the index · 1.7%

YTyr

Tyrosine aromatic

hydropathy: -1.3
charge: 0
residue mass: 163.2 Da

37 in the index · 3.2%

VVal

Valine hydrophobic

hydropathy: +4.2
charge: 0
residue mass: 99.1 Da

44 in the index · 3.8%

Hydropathy values are the Kyte-Doolittle scale. Charge is the formal side-chain charge at pH 7.4. Residue mass is the average mass contributed to a chain (free amino acid minus water). Colour scheme is Clustal-style, by side-chain chemistry.