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Protein Protocols Protein Protocols

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787<br />

Lens culinaris Man GlcNAc(β-1,2)Man(α-1,6) Fuc(α-1,6)<br />

(LCA)<br />

Man(β-1,4)GlcNAc(β-1,4)GlcNAc(β-1,N)Asn<br />

GlcNAc(β-1,2)Man(α-1,3)<br />

Note: LCA is specific of mannose (α-1,3) or (α-1,6). Fucose (α-1,6) linked to GlcNAc is required for the<br />

reaction (3).<br />

Galanthus nivalis Terminal Man(α-1,2)(α-1,3) or (α-1,6)Man<br />

(GNA) Man<br />

Note: GNA is particularly useful for identifying high mannose or hybrid type oligosaccharide structure because<br />

it does not react (unlike ConA) with biantennary complex type chains (21,22).<br />

Datura GlcNAc [Gal(β-1,4)GlcNAc(β-1,3)]nGal(β-1,4)GlcNAc(β-1,2)<br />

stramonium Man(α-1,6)<br />

(DSA) [Gal(β-1,4)GlcNAc(β-1,3)] nGal(β-1,4)GlcNAc(β-1,6)<br />

Peanut Gal Gal(β-1,3)GalNAc<br />

agglutinin<br />

(PNA) refs. 22 and 23<br />

[Gal(β-1,4)GlcNAc(β-1,3)] nGal(β-1,4)GlcNAc(β-1,2) Man(α-1,3)<br />

Note: Datura lectin is specific for Gal-GlcNAc termini of complex oligosaccharides (22).<br />

Man(β-1,m4)GlcNAc(β-1,4)GlcNAc(β-1,N)Asn<br />

Phaseolus GlcNAc Gal(β-1,4)GlcNAc(β-1,2)Man(α-1,6)<br />

vulgaris GlcNAc(β-1,4) Man(β-1,4)GlcNAc(β-1,4)GlcNAc(β-1,N)Asn<br />

(E-PHA) Gal(β-1,4)GlcNAc(β-1,2)Man(α-1,3)<br />

erythroagglutinating<br />

phytohemagglutinin<br />

Note: A bisecting GlcNAc residue that links (β-1,4) to the β-linked mannose residue in the core is an essential<br />

and specific determinant for high-affinity binding to E-PHA-agarose column. Without this bisecting GlcNAc<br />

residue, a complex-type glycopeptide is not retained by E-PHA-agarose (24).<br />

Lectin Blotting to Detect Glycoproteins 787<br />

(continued)

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