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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Putnam, F.W. et al.

Primary structure of a human IgA1 immunoglobulin. IV. Streptococcal IgA1 protease, digestion, Fab and Fc fragments, and the complete amino acid sequence of the alpha 1 heavy chain.

In order to establish the complete amino acid sequence of the human IgA alpha1 chain Bur, IgA1 protease from Streptococcus sanguis was employed to generate Fabalpha and Fcalpha fragments in the final stage of this investigation. Cyanogen bromide cleavage of the Fabalpha fragment followed by reduction and aminoethylation produced the Fd' fragment (residues 84 to 227); this contains part of the variable region (VR), the whole first constant domain (Calpha1), and part of the hinge region of this heavy chain. The tryptic peptides of the Fd' fragment were isolated, characterized, and sequenced. The results together with the data in the preceding papers on chymotryptic, tryptic, and thermolysin peptides permitted the complete amino acid sequence of the human IgA alpha1 chain to be established.[1]

References

Primary structure of a human IgA1 immunoglobulin. IV. Streptococcal IgA1 protease, digestion, Fab and Fc fragments, and the complete amino acid sequence of the alpha 1 heavy chain. Putnam, F.W., Liu, Y.S., Low, T.L. J. Biol. Chem. (1979) [Pubmed]

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