Round 5: Tossup 13

Binding of the Hrs protein to ubiquitin and Pl(3)P stimulates this process by kickstarting the ESCRT (“escort”) complex. After AP2 binds to a tyrosine-laden motif on a cytoplasmic “tail,” it recruits a triskelion-shaped molecule that mediates this process. This process can occur through caveolae, but its most common type is receptor-mediated, (15[1])taking place through pits coated with (*) clathrin. The “late” product of this process undergoes fusion with the lysosome. This process involves stabilization of membrane curvature and the formation of vesicles. For (10[1])10 points, name this process in which a cell takes up molecules in contrast to exocytosis. ■END■ (10[1])

Back to tossups

Buzzes

Summary