Multiple zeins from maize endosperms characterized by reversed-phase high performance liquid chromatography
1991
Wilson, C.M.
The major storage proteins of maize (Zea mays L.) endosperm are located in protein bodies, and may be separated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) into two major classes and four minor classes of polypeptides. The two major classes (commonly known as zeins) have been separated previously into a large number of components by isoelectric focusing (IEF). Reversed-phase high performance liquid chromatography (HPLC) further separated the major classes into additional components, and gave distinctive peaks for each minor zein class. Some IEF bands produced two or more HPLC fractions, while some HPLC fractions produced two or more IEF bands. Apparently identical IEF bands from different inbreds may appear in different fractions after HPLC. Thus the total number of zeins revealed by separations based on apparent size (SDS-PAGE), net charge (IEF), and hydrophobicity (HPLC) is very large. Different laboratories have developed diverse nomenclatures which cause much confusion. A key is presented to provide a flexible and expandable nomenclature for this complex group of proteins.
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