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Articles

Immunological Similarities of Proteinase Inhibitors from Potatoes ¹

^a Department of Agricultural Chemistry and Program in Biochemistry and Biophysics, Washington State University, Pullman, Washington 99163

Proteinase inhibitors, purified independently from Japanese, United States, and German potato varieties, and having different physicochemical and inhibitory properties, are shown to be immunochemically similar. These results indicate that the heterogeneity found among proteinase inhibitors from potato tubers is apparently due both to intervarietal, as well as intravarietal, variations in isoinhibitor components.

¹ This work was supported in part by National Science Foundation Grants GB-37972 and PCM-75-23629, United States Department of Agriculture Cooperative States Research Service Grant 316-15-60, and by a grant from the Deutsche Forschungsgemeinschaft. Scientific Paper No. 4533, Project 1791, College of Agriculture Research Center, Washington State University.