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The protein responsible for muscular dystrophy, dystrophin, is a __________ protein.

(a) cross-linking

(b) membrane-binding

(c) tethering

(d) severing

The question was asked in semester exam.

Asked question is from Non-muscle Motility topic in portion Cytoskeleton and Cell Motility of Cell Biology

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Right option is (b) membrane-binding

To explain I would say: Dystrophin is a cylindrical shaped protein made up of about 3700 amino acid residues and is  present in the muscles. It attaches the muscle fibres to the surrounding extracellular matrix thereby acting as a membrane binding protein.

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