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Carbohydr Res. 2009 Sep 28;344(14):1858-62. doi: 10.1016/j.carres.2008.11.010. Epub 2008 Nov 27.

An extended set of monoclonal antibodies to pectic homogalacturonan.

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  • 1Centre for Plant Sciences, University of Leeds, United Kingdom.


Three novel rat monoclonal antibodies, designated LM18, LM19 and LM20, were isolated from screens for binding to Arabidopsis thaliana seed coat mucilage. The binding of these antibodies to mucilage subject to enzyme and high pH pre-treatments and to a series of model homogalacturonan-rich pectins with defined levels of methyl-esterification indicated their recognition of pectic homogalacturonan epitopes. The binding capacities of these monoclonal antibodies to cell walls in sections of tobacco stem pith parenchyma were also differentially sensitive to equivalent treatments with high pH buffers and pectate lyase. The epitopes bound by these antibodies display some similarities and some differences to the epitopes recognized by the previously isolated and established pectic homogalacturonan probes JIM5 and JIM7.

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