La Rivista di chimica biologica . pe seedglobulin.* Squash seedglobulin.t ? Seme di melone glutelin.t ammide per cento 1.390.147.159.69 per cento1.420.217.149.67 per cento1.23 Humin 0,41 5,74 di base non-base Totale 9.01 18,37 18,44 16.39 * tenore di azoto, 18.42 per cento.t contenuto di azoto, 18.39 per cento.x contenuto di azoto, 16.37 per cento. metodo inoltre ha dato risultati che concordano entro i limiti di errorof questo metodo per analisi di duplicati della stessa proteina. D. B. Jones e C. E. F. Gersdorff 83 in aggiunta ai valori riscontrati per la cistina dalla Van Slykemethod, il contenuto di questo ammino-ac

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The Journal of biological chemistry . pe seedglobulin.* Squash seedglobulin.t ? Cantaloupe seed glutelin.t Amide per cent 1.390.147.159.69 per cent1.420.217.149.67 per cent1.23 Humin 0.41 Basic 5.74 Non-basic 9.01 Total 18.37 18.44 16.39 * Nitrogen content, 18.42 per cent.t Nitrogen content, 18.39 per cent.X Nitrogen content, 16.37 per cent. method also gave results which agree within the limits of errorof this method for duplicate analyses of the same protein. D. B. Jones and C. E. F. Gersdorff 83 In addition to the values found for cystine by the Van Slykemethod, the content of this amino-acid was also determinedcolorimetrically by the recently published method of Folin andLooney (2). It is of interest to note the close agreement betweenthe results obtained by the two different methods (Table III).Tryptophane was determined colorimetrically according to themethod of May a-nd Rose (3). The percentage of tryptophanefound in the two globuhns, together with those of the diamino-acids, is given for comparison in Table III.. Fig. 1. Globulin from the cantaloupe seed, Cucumis melo.Photomicrographs by G. L. Keenan. X210. The globulins of both the squash seed and cantaloupe seedwere obtained in the form of regular, microscopic octahedra.Samples of the globulins were submitted to Dr. E. T. Wherryand Air. G. L. Keenan of the Bureau of Chemistry, who kindlymade the crystallographic and optical examinations and preparedthe photomicrographs (Figs. 1 and 2). No difference in thecrystallographic or optical properties of the two globulins wasdetected. 84 Proteins of the Cantaloupe Seed In view of the practically identical results obtained bj thestudy of the chemical and physical properties of these two globuhnsit was of interest to compare them with respect to their immuno-logical relations. Through the kind cooperation of Prof. H. G.Wells of the University of Chicago, we have been enabled to securedata to make this comparison. Guinea pigs sensitized withsquash seed globulin react

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• bookcentury1900
• bookdecade1900
• booksubjectbiochem
• bookyear1905