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Table 3 SAARs composition by amino acid.

From: COPASAAR – A database for proteomic analysis of single amino acid repeats

Amino Acid

Eukaryotes

Archaea

Bacteria

Arginine

0.75%

0.75%

0.74%

Lysine

1.0%

1.05%

0.72%

Glutamic Acid

1.28%

1.45%

0.89%

Aspartic Acid

0.67%

0.65%

0.55%

Glutamine

0.57%

0.18%

0.42%

Asparagine

0.63%

0.37%

0.35%

Histidine

0.17%

0.09%

0.13%

Proline

0.83%

0.42%

0.43%

Tyrosine

0.23%

0.37%

0.21%

Tryptophan

0.04%

0.04%

0.04%

Serine

1.76%

0.90%

0.85%

Threonine

0.68%

0.60%

0.59%

Glycine

0.90%

1.10%

1.09%

Alanine

1.14%

1.38%

1.92%

Methionine

0.10%

0.11%

0.12%

Cysteine

0.10%

0.03%

0.04%

Phenylalanine

0.38%

0.38%

0.37%

Leucine

1.87%

1.95%

2.02%

Valine

0.80%

1.31%

1.03%

Isoleucine

0.61%

1.23%

0.74%

  1. Legend: The dominant amino acids are leucine and serine (Eukaryotes), leucine and glutamic acid (Archaea), and leucine and alanine (Bacteria). Amino acids considered highly abundant are highlighted in bold.