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Table 1 Predicted amino acid content of feather keratin from Gallus gallus (chicken) and Columba livia (rock dove) as compared to determined amino acid content for chicken [29]

From: The reduced genome of a heritable symbiont from an ectoparasitic feather feeding louse

Amino Columba livia Gallus gallus Chicken
Acid (Predicted) (Predicted) (Arai et al. 1983)
Phenylalanine 2.60% 3% 3.90%
Histidine 0.70% 0.60% 0%
Isoleucine 4.60% 4.50% 4.60%
Lysine 0.30% 0.20% 0%
Leucine 6.30% 6.60% 7%
Methionine 1.20% 1.20% 0%
Arginine 3.50% 4.60% 4.50%
Threonine 5.10% 5.10% 4.70%
Valine 8.90% 7.90% 7.40%
Tryptophan 0.30% 0.20% 0%
  1. Values are presented as a percent of overall amino acid content (contribution of amino acids that insect do not require from an exogenous source are not shown)