Purification of an Infection-Related, Extracellular Peroxidase from Barley
Author(s) -
K. Kerby,
Shauna Somerville
Publication year - 1992
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.100.1.397
Subject(s) - hordeum vulgare , peroxidase , extracellular , isoelectric point , isoelectric focusing , biochemistry , antiserum , ion chromatography , powdery mildew , heme , biology , acetone , isozyme , glycoprotein , hemeprotein , chromatography , chemistry , enzyme , botany , poaceae , antibody , immunology
Increases in two extracellular peroxidases were observed following inoculation of barley (Hordeum vulgare L.) with the powdery mildew pathogen (Erysiphe graminis DC.: Fr. f. sp. hordei Em. Marchal). The more prominent isozyme, P8.5, was purified from intercellular wash fluids by acetone precipitation, ion-exchange chromatography, isoelectric focusing, and gel filtration. Purified P8.5 is a heme-containing, glycoprotein with a M(r) of 35,000. It has eight cysteine residues. A highly specific, high-titer antiserum to deglycosylated P8.5 was produced.
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