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. 1971 Jun;123(2):191-200.
doi: 10.1042/bj1230191.

Studies on the high-sulphur proteins of reduced merino wool. Amino acid sequence of protein SCMKB-3B 3

T Haylett, L S Swart, D Parris

Studies on the high-sulphur proteins of reduced merino wool. Amino acid sequence of protein SCMKB-3B 3

T Haylett et al. Biochem J. 1971 Jun.

Abstract

The complete amino acid sequence of wool protein SCMKB-IIIB3 was determined. The peptides used for the sequence work were obtained by peptic and thermolysin digestions and were fractionated by chromatography on DEAE-cellulose, paper chromatography and electrophoresis. The peptides were analysed by dansyl-Edman degradation, mass spectrometry and tritium-labelling of C-terminal residues. The protein consists of 98 residues and has acetylalanine as N-terminal residue and carboxymethylcysteine as C-terminus. It is homologous with protein SCMKB-IIIB2 (Haylett & Swart, 1969). A salient feature of the sequence of protein SCMKB-IIIB3 is three consecutive cysteine residues.

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