William Aubery discovered that the $x-$ray diffraction pottern of wool shows a repeating structural unit spaced about $52$ A along spacing of about $5\mathrm{.}2$ A$.$ Alsough these ebservations provided important clues to sthe molecular stracture of wool, Authory was unable to interpeet them at the time.

What molecelar properties of the wool filer polypepeide upport Abstary"s observations?

primarily comists of a hellices.

The initial structure has many beta tarms that are lost from stoming and stretching, resulting in primarily $$ conformations.

structeres, leaving coly the primary arectere.

shere in all remain wallecent

presence of lined.