Structure and action of heteronemertine polypeptide toxins. Amino acid sequence of Cerebratulus lacteus toxin B-II and revised structure of toxin B-IV.
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چکیده
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Structure and action of heteronemertine polypeptide toxins. Amino acid sequence of Cerebratulus lacteus toxin B-II and revised structure of toxin B-IV.
The primary structure of Cerebratulus lacteus toxin B-II has been investigated by automated Edman degradation of the reduced, carboxymethylated protein and of tryptic peptides derived from the maleylated protein. As a result of these studies, the identity of all 55 amino acid residues in the polypeptide chain has been unambiguously determined. Hydroxyproline, an amino acid not normally found in...
متن کاملStructure and Action of Heteronemertine Polypeptide Toxins
The positions of the disulfide bonds in Cerebratulus lacteus toxin B-IV were investigated by hydrolysis of the unreduced protein with a variety of proteases. The resulting peptides were purified by gel filtration, ion exchange chromatography, and preparative paper electrophoresis and chromatography. Determination of the amino acid compositions of the cystine-containing peptides purified demonst...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1981
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)52508-x