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Figure 4 | BMC Evolutionary Biology

Figure 4

From: Convergent evolution of cysteine-rich proteins in feathers and hair

Figure 4

Avian EDCRPs contain conserved sequences at the amino-terminus and the carboxy-terminus as well as a variable number of conserved sequence repeats in the central segment. Amino acid sequences of epidermal differentiation cysteine-rich protein (EDCRP) from various bird species were aligned. Vertical lines separate the amino-terminus, the repeats of the central region and the carboxy-terminus. Hyphens were introduced to optimize the alignment. Color shading highlights the amino acid residues C, K, P and Q, which are assumed to be important for the function of the protein (see main text). x, amino acid residue missing because of gaps in genome sequences. Species: Adélie penguin (Pygoscelis adeliae), canary (Serinus canaria), chicken (Gallus gallus), duck (Anas platyrhynchos), egret (Egretta garzetta), emperor penguin (Aptenodytes forsteri), falcon (Falco cherrug), flycatcher (Ficedula albicollis), loon (Gavia stellata), mesite (Mesitornis unicolor), pigeon (Columba livia), ostrich (Struthio camelus australis), tinamou (Tinamus guttatus), zebra finch (Taeniopygia guttata).

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