Additional file 2.

Neurotrophin sequences. Amino-acid sequence of Callorhinchus milii (references from GeneBank), Scyliorhinus canicula, Petromyzon marinus and Lampetra fluviatilis (references from EMBL) NT encoding sequences characterized in this study aligned with Lampetra NT1 and human NT sequences for comparison (references from GeneBank). Cysteine residues involved in the cystine knot structure are in red. The amino acid sequence of the region of NTF4rp resulting from the shift in the open reading frame (see Additional file 3) is given in italic.

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Dos Santos et al. BMC Evolutionary Biology 2011 11:332   doi:10.1186/1471-2148-11-332