Answer to Question #32500 in Other Biology for Sumit
The most prominent component of the red cell membrane cytoskeleton, by molecular mass at least, is a fibrous polypeptide called spectrin. Two isoforms of spectrin, alpha (260 kDa) and beta (225 kDa), form a loosely wound helix. The spectrin tetramers are organized into a meshwork that is fixed to the membrane by the protein ankyrin (215 kDa). Ankyrin is itself connected to a transmembrane protein called 'band 3' or anion exchanger protein (90 to 100 kDa). Specific organization of the named proteins contributes to the shape of erythrocytes.
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