Electrophoretic analysis of tubular proteinuria. Immunological identification of electrophoretic components.:Immunological identification of electrophoretic components
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概要
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Urines from Fanconi's patient (as a example of tubular proteinuria) were electrophoresed on the SDS-polyacrylamide gel showing high resolving power in the low molecular weight range, and the identification of indivisual protein bands after an electrophoretic separation was performed by an immunological method. Urinary proteins were radiolabeled by reductive methylation with 14C-formaldehyde and sodium cyanoborohydride. Immunoprecipitates were obtained from 14C labeled urinary proteins to which antisera against serum proteins characteristic of nephropathy and then formalin-fixed S. aureus cells were added. Immunoprecipitates were then electrophoresed and analyzed by fluorography. A fluorogram of 14C labeled urinary proteins resembled a silver-stained electrophoretic pattern of urinary proteins. Among the major bands having molecular weights of 67K, 52K, 42K, 28K, 22K, 16.7K, and 8.9K, the following bands were identified; albumin (67K), α1-acid glycoprotein (42K), α1-microglobulin (28K), retinol-binding protein (22K), and β2-microglobulin (8.9K). But, β2-microglobulin showed a molecular weight of 11.2K on electrophoresis after the urinary proteins were treated with reducing agent.
- 日本電気泳動学会の論文
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