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#structural protein

5 public questions tagged with this topic.

Which of the following is a structural protein providing support to the RBC membrane?

Erythrocyte membrane mechanical resilience originates from spectrin ankyrin network linkage. Ankyrin-1 large adaptor of approximately two hundred six kilodaltons comprises three domains: N-terminal membrane binding domain of twenty four ankyrin repeats each thirty three residues forming elongated solenoid that binds high affinity site on Band 3 cytoplasmic domain residues one seventy five to one eighty five and other integral proteins sodium-potassium ATPase, sodium channel Nav1.5, cell adhesion molecule L1; central spectrin binding domain of about one hundred residues binding beta spectrin re

Ref: Bennett and Healy, Membrane Protein Complexes and Ankyrin Function, Annu Rev Cell Dev Biol.

Which of the following structural proteins is primarily found in hair, nails, and wool?

Keratin is the correct answer as it accurately identifies the biological location, composition, or distribution described in this question. In Protein, the spatial organization and localization of molecules are critical to their function. Keratin is specifically associated with the structure or compartment mentioned because of its unique biochemical properties and physiological role. The other options (Actin, Myosin, and Collagen) are primarily associated with different cellular compartments, tissues, or structural contexts.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 4