Abstract:
:A new bacterial agglutinin was isolated from seeds of the soybean cultivar Clark. Purification was carried out by ammonium sulfate precipitation and ion-exchange chromatography. The agglutinin is a heat-labile glycoprotein most active at pH 4.0. Addition of Ca(2+), Mn(2+) and Mg(2+) did not enhance the agglutinating activity of this glycoprotein. Gel electrophoresis in the presence of sodium dodecyl sulfate showed that the agglutinin is composed of two subunits of approximately 50,000 daltons each. In the undissociated state, it agglutinates Xanthomonas phaseoli var. sojensis, the causal agent of bacterial pustule disease of soybean, at concentrations as low as 10 micrograms protein per milliliter but has no hemagglutinating activity. The agglutinin could be distinguished from previously reported soybean lectins on the basis of solubility in ammonium sulfate, lack of hemagglutinating activity, molecular weight, hapten specificity, and immunological determinants.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Fett WF,Sequeira Ldoi
10.1104/pp.66.5.847subject
Has Abstractpub_date
1980-11-01 00:00:00pages
847-52issue
5eissn
0032-0889issn
1532-2548journal_volume
66pub_type
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