(A) Amino acid sequence of chicken Coch-5B2. A predicted signal peptide at the amino terminus is underlined; a putative N-glycosylation site (N-X-[S/T]) at amino acid positions 218–220 is printed in bold. (B) Comparison of the deduced chicken connexin 31 (cCx31) amino acid sequence with those of murine connexins 26 (mCx26) and 30 (mCx30). Identical amino acid residues are marked with dots, and gaps are indicated by dashes. Potential transmembrane domains of chicken connexin 31 at amino acid positions 23–39, 76–92, 138–154, and 189–205 are indicated by lines. (C) Comparison of the chicken homogenin amino acid sequence with those of human gelsolin and bovine adseverin. Identical residues are marked with dots, and gaps are indicated by dashes. Note that the similarities of homogenin to gelsolin and to adseverin are distributed nearly equally throughout the protein. (D) Amino acid sequence of chicken otokeratin. Two putative cAMP- and cGMP-dependent protein kinase phosphorylation sites ([R/K]-[R/K]-X-[S/T]) are underlined. Eight putative protein kinase C phosphorylation sites ([S/T]-X-[R/K]) are printed in bold. The intermediate-filament signature motif ([I/V]-X-[T/A/C/I]-Y-[R/K/H]-X-[L/M]-L-[D/E]) is boxed.