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Improvement of fruit allergenic extracts for immunoblotting experiments
Author(s) -
Martínez A.,
FernándezRivas M.,
Martínez J.,
Palacios R.
Publication year - 1997
Publication title -
allergy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.363
H-Index - 173
eISSN - 1398-9995
pISSN - 0105-4538
DOI - 10.1111/j.1398-9995.1997.tb00969.x
Subject(s) - chromatography , fractionation , pear , chemistry , ion chromatography , ion exchange , pulp (tooth) , electrophoresis , botany , biology , ion , organic chemistry , medicine , pathology
A method based on ion‐exchange column chromatography to enhance the protein content of fruit allergenic extracts was found to help make the subsequent SDS‐PAGE immunoblotting assays possible; otherwise, they were difficult to achieve due to the high carbohydrate content. Fractionated extracts of apple, pear, and peach (peel and pulp) were obtained by anion‐exchange chromatography (Q‐Sepharose TM column), providing clear electrophoretic patterns which allowed IgE detection by enzymatic assays of the transferred membranes. This chromatographic method produced in one single step an enriched extract directly from the standard crude aqueous one, with an increment in the protein content of more than sixfold, on average; thus, it proved to be more suitable than the usual chemical fractionation procedures.