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Density‐gradient ultracentrifugation of A. pisum APN in the presence of the glucose/mannose‐binding lectin ConA and WGA (sialic acid/N‐acetylglucosamine binding). (A) APN with WGA lectin; (B) APN with ConA; (C) APN with ConA and 500 mmα‐methyl mannoside, a competitive sugar. Note that the sedimentation of APN with WGA is closer to that in Fig. 2C.
