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Plant Physiol. 1988 May;87(1):250-4.

Soybean vegetative storage protein structure and gene expression.

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Department of Agronomy, University of Nebraska, Lincoln, Nebraska 68583-091.


Depodded soybean (Glycine max [L] Merr. cv Williams) plants accumulate high levels of a glycoprotein in their leaves that has many features of a storage protein. The protein is found in all vegetative tissues which have been examined but not in the seeds. Translation in vitro indicated that elevated mRNA levels were at least partially responsible for the specific increase in vegetative storage protein. cDNA clones were isolated and sequenced, and an amino acid sequence was predicted. Although the amino acid composition is similar to that of seed storage proteins, no sequence similarity could be detected. Northern blot hybridization confirmed a large increase in vegetative storage protein mRNA in leaves of depodded plants. The vegetative storage proteins are represented by about four gene copies in the haploid genome.


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