Follistatin precursors predicted ORFs and conserved peptide.

<p><b>A, B</b>) Complete and a partial follistatin precursor predicted ORFs (derived from CL3958.Contig2_All and Unigene49446_All) each starting with a signal peptide (red) followed by an identical follistatin domain (green) with 4 conserved cysteine residues (yellow), followed by a kazal-type serine protease inhibitor domain (pink) with 5–6 cysteine residues (yellow). The complete, shorter isoform (A) ends with a predicted transmembrane domain (blue). Asterisk indicates the stop codon. <b>C</b>) Amino acid alignment between the kazal-type domains.