Subcellular Structure of Endosperm Protein in High-Lysine and Normal Corn

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Science  04 Aug 1967:
Vol. 157, Issue 3788, pp. 556-557
DOI: 10.1126/science.157.3788.556


Optical microscopy shows that the protein network in endosperm cells of normal corn is composed of an amorphous matrix in which granules averaging about 2 microns in diameter are embedded. That these granules are rich in zein is demonstrated by their solubility in 80 percent ethanol. High-lysine corn, with submicroscopic granules clearly resolved only in the electron microscope, has a much lower content of zein than normal corn. The small size of subcellular protein granules in high-lysine maize as compared with normal corn correlates with the reported difference in zein content of the two types of corn.

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