The presence of a major soluble protein in sweet potato [Ipomoea batatas (L.) Lam.] storage roots was demonstrated by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). Three research groups have previously isolated a major soluble protein. Results from SDS-PAGE in this study indicate that all three proteins (ipomoein, sporamin, and an unnamed 25-kDa protein) appear to be the same. Ipomoein is suggested as the preferred name for this soluble protein.
Graduate Research Assistant.
Received for publication 1 Sept. 1988. Paper no. 11798 of the Journal Series of the North Carolina Agricultural Research Service, Raleigh, NC 27695-7643. Mention of a trademark or proprietary product does not constitute a guarantee or warranty of the product by North Carolina State Univ. nor does it imply approval to the exclusion of other products that may be suitable. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.