title: Amino acid sequences of alpha-helical segments from S-carboxymethylkerateine-A. Statistical analysis.
abstract: The distribution of the different types of amino acid residue within two helical segments isolated from the low-sulphur fraction of wool keratin was examined for periodicity and larger sequence repeats. Both were detected, the former corresponding to the geometry of the proposed coiled=coil structure and the latter suggesting a distant gene duplication, though the existence of the repeat might equally well be related to interactions within the microfibril.
mesh_terms: D000595:Amino Acid Sequence; D055598:Chemical Phenomena; D002621:Chemistry; D007633:Keratins; D010446:Peptide Fragments / Q000032:analysis; D013057:Spectrum Analysis; D013223:Statistics as Topic; D014934:Wood
chemical_list: D010446:Peptide Fragments; D007633:Keratins