Is α-keratin before it coils with another polypeptide, makes chains, and build intermediate filaments a fully functional protein?

I mean, is the single monomer of α-keratin a protein or does it have to become a dimer to become a protein?


1 Answer 1


What we call as protein is the final quaternary structure. Whether it is translated from a single gene or from multiple genes (as in haemoglobin), always the structure with all bonds and interactions taken into account. Similarly here the alpha- Keratin forms Disulfide bonds to form a functional protein.


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