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Psophocarpus Tetragonolobus Lectin II

Like PTL I, this lectin binds preferentially to N-acetylgalactosamine, with this sugar also being the most inhibitory monosaccharide. However, in contrast to PTL I, this lectin prefers the β anomeric configuration. PTL II shows a high affinity toward blood group H structures and the T-antigen. PTL I and PTL II also differ in their erythrocyte agglutinating properties.

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