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Conserved amino acids are shown in bold. The four Cys residues characteristic of CSPs are underlined. The residues or motifs in italic indicate specific mutations sites leading to amino acid replacement. Ala and Glu residues at position 1 are based on N-terminal sequencing of cockroach and moth CSPs [11, 13]. Bars in black indicate the position of putative alpha-helical domains (http://npsa-pbil.ibcp.fr).
