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Amino acid sequence of microprotein S, which consists of a Gla-rich module (residues 1–46), the TSR module (residues 47–75), and the EGF1 module (residues 76–116). The gray residues at positions 46–47 and 79–80 represent the Gly-Cys and Gln-Cys native chemical ligation sites. Bold Asp residues represent putative cleavage sites for endoproteinase Asp-N. A solid line joins disulfide-bonded Cys residues. γ denotes γ-carboxyglutamic acid.
