Turk's cap. Bora Bora. Photo©CLCase

Biology 230

Membrane Receptors

(BIOL 230, Lab Experiment 9)

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A lectin is
A protein
A carbohydrate-binding protein
A protein-binding carbohydrate
A glycolipid

 

Left: Cheek cells. Right: Lectin-bound check cells.
What does this tell you about your cell membranes?

Looking at tubes:

A normal cell.

Lectin with an indicator binds to the cell. The indicator is made visible by the addition of substrate.

 

Normal cells.

Lectin causes cells to agglutinate.

The presence of sugar A will prevent the lectin from binding to the cell surface.

 

What would happen if sugar B was present in the absence of sugar A?

Class slides

 
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