Other
Scientific paper
Apr 1960
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1960natur.186..392d&link_type=abstract
Nature, Volume 186, Issue 4722, pp. 392 (1960).
Other
1
Scientific paper
IN order to improve the specificity of a bovine tuberculin purified protein derivative, precipitated with trichloracetic acid from heated culture filtrates1, we decided to investigate its protein composition2, and in this connexion we experimented with zone electrophoresis on paper-strips. Now this procedure has hitherto not been very successful3-5, and in spite of our own numerous experiments with various procedures and methods we did not obtain anything other than unusable pictures of `comets' or streaks. (This is in contrast with the more satisfying results obtained by others with non-heated tuberculins4,5.) Smithies introduced starch gel electrophoresis which seems to be of great value in determining the ultrastructure of serum-protein patterns6,7, the composition of toxins8 and of cerebrospinal fluid9. Sorkin et al.10 made preparative separations of some tuberculoprotein preparations from unheated culture filtrates by electrophoresis in starch gels, followed by transfer into glass. Our own investigations on this starch-gel electrophoresis led to the following method.
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