Amino Acids, Peptides and Proteins (SPR Amino Acids, by J. S. Davies

By J. S. Davies

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Extra resources for Amino Acids, Peptides and Proteins (SPR Amino Acids, Peptides, and Proteins (RSC)) (Vol 2)

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Res. , 1968, 33, 378. D. W. Thomas, E. Lederer, M. Bodanszky, J. Izdebski, and I. Muramdtsu, Nature, 1968,220, 580. D. W. Thomas and T. Ito, Tetrahedron, 1969, 25, 1985. J. Lenard and P. M. Gallop,JnaZyt. , 1969, 29, 203. A. A. Kiryushkin, V. A. Gorlenko, B. V. Rosinov. Yu. A. Ovchinnikov and M. M. Shemyakin, Experrentia, 1969. 25. 913. 34 Amino-acids, Peptides, and Proteins I t is ericouraging to see that more conventional peptides are now having their sequences successfully analysed by mass spectrometry.

Acad. Sci. , 1968, 61, 636. ‘I5 P. Cuatrecasas and M. Wilchek, Biochem. Biophys. Res. , 1968, 33, 235. IJ6I. Kato and C. B. Anfinsen, J. Biol. , 1969, 244, 5849. 137 J. K. Inman and H. M. Dintzis, Biochemistry, 1969, 8, 4074. M. De Mets, A. Lagasse, and M. Rabaey, J. , 1969,43, 145; D . P. Blattler, Analyt. , 1969, 27, 73. 138 E. W. Johns, J. , 1969, 42, 152. 1 4 0 D. G . Brown, C . Baron, and A. Abrams, Biochim. Biophys. Acta, 1968, 168, 386. 141 D. H. Leaback and A. C . Rutter, Biochem. Biophys.

Godin, Canad. J. , 1969, 47, 401. l~~A water-insoluble organomercurial copolymer of ethylene and maleic acid is prepared and only peptides and proteins containing free thiol groups can be bound. These may subsequently be recovered by elution with mercaptoethanol. Along the same lines, but embodying the principle of reversible binding to a specific substrate or competitive inhibitor, is the method of enzyme purification described by Anfinsen and his The inhibitor or substrate is bound covalently to a cross-linked polymer or gel (the cross-linked dextran agarose is found to be convenient since attachment of the appropriate compound containing unprotonated amino-groups is readily achieved after ‘activation’ of the gel with cyanogen bromide) and after elution of the contaminating proteins, the desired enzyme is eluted by changes in ionic strength or pH or by adding substrate or competitive inhibitor to the eluting buffer.

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