Step 1: Endocytosis allows cells (blue-green) to import proteins and other particles (pink).
Step 2: The membrane bends inward like a catcher's mitt to receive the cargo.
Step 3: Coils of dynamin protein (orange) seal the cargo into a compartment within the cell. The current research reveals new details about this part of the process.
Step 4: At the completion of endocytosis, the cell has fully internalized the cargo within a bubble known as a vesicle.