Biology

Costa

27 December, 11:56

Which of the following statements about α-keratins is FALSE?

1) Individual molecules are α-helical.

2) They include a major class of protein that comprises hair, fingernails and animal skin.

3) There is a strip of contiguous hydrophobic surface making a shallow spiral around the helix.

4) Pairs of α-helices twist about each other in a coiled-coil structure held together entirely by hydrophobic interactions.

5) They include a small globular regions covalently linked to the surface.