Despite the variety of their physiological function and differences in physical properties--silk is a flexible fiber, horn a tough rigid solid, and the enzyme pepsin water soluble crystals--proteins are sufficiently similar in molecular structure to warrant treating them as a single chemical family.
Disney's 'Tower of Terror' Closing to Make Way for New 'Guardians of the Galaxy' Ride. Looks like another Disney attraction is joining its sizable graveyard of defunct rides.
April 19, 2017: WDWMagic.com user MansionButler84 is reporting that he expects The Great Movie Ride to close at some point between August 14, 2017 and September 5, 2017. April 9, 2017: WDWMagic.com user marni1971 is reporting that the Mickey attraction is expected to open in early Fall 2019.