cystine/nicotiana

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Expression and biological activity of the cystine knot bioinsecticide PA1b (Pea Albumin 1 Subunit b).

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The PA1b (Pea Albumin 1, subunit b) peptide is an entomotoxin extract from Legume seeds with lethal activity on several insect pests, such as mosquitoes, some aphids and cereal weevils. This 37 amino-acid cysteine-rich peptide has been, until now, obtained by biochemical purification or chemical

Purification and characterization of a galactose-rich basic glycoprotein in tobacco.

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We found a galactose-rich basic glycoprotein (GBGP) in the cell walls of cultured tobacco (Nicotiana tabacum) cells. GBGP and extensin were isolated as the major components of basic, salt-extracted cell wall glycoproteins. GBGP and extensin were separated by gel filtration in 6 M guanidine

Purification, some properties, and primary structure of base non-specific ribonucleases from Physarum polycephalum.

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Two ribonucleases (RNase Phya and RNase Phyb) were purified to homogeneity on SDS-PAGE from the culture filtrate of the fungus Physarum polycephalum. The apparent molecular weights of RNases Phya and Phyb were about 20,000. The pH optima of these two RNases were around 4.5-4.75. The RNases released

Emission of Hydrogen Sulfide by Leaf Tissue in Response to l-Cysteine.

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Leaf discs and detached leaves exposed to l-cysteine emitted a volatile sulfur compound which was proven by gas chromatography to be H(2)S. This phenomenon was demonstrated in all nine species tested (Cucumis sativus, Cucurbita pepo, Nicotiana tabacum, Coleus blumei, Beta vulgaris, Phaseolus

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