PMID: 697726Aug 1, 1978Paper

Amino acid sequences of alpha-helical segments from S-carboxymethylkerateine-A. Statistical analysis

The Biochemical Journal
T C EllemanJ Van Der Touw

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.

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