Purification and Characterization of a Natural Lectin from the Seed of Peanut Arachis hypogaea

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A natural lectin from the seed of peanut Arachis hypogaea was purified by singlestep affinity chromatography using galactoside-coupled agarose. This lectin was named PN-L and its inactive form had a molecular mass estimate of 29 kDa. The lectin PN-L was detected for agglutinating activity, glycoinhibiting action and thermostability. The influence of pH on those activities was also tested. The results showed that PN-L could not agglutinate three kinds of human erythrocytes. But it showed a strong affinity for human A/B/O erythrocytes (RBC) by neuraminidase treated. Agglutinating activity of PN-L to neuraminidase treated human O erythrocytes was inhibited by lactose , raffinose, melibiose and D-galactose. The agglutinating activity of peanut seed lectin was inhibited at temperatures greater than 55 and at a pH less than 5 or greater than 11.

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Advanced Materials Research (Volumes 152-153)

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1499-1504

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October 2010

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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