FOCAL POINT Intestinal cells release enzyme-laden vesicles into the gut lumen from the tips of their microvilli (red circles) through the action of the motor protein myosin-1a. Russell McConnell (left), Matthew Tyska (right) and colleagues think these lumenal vesicles function to process nutrients and protect against bacterial infection.

FOCAL POINT Intestinal cells release enzyme-laden vesicles into the gut lumen from the tips of their microvilli (red circles) through the action of the motor protein myosin-1a. Russell McConnell (left), Matthew Tyska (right) and colleagues think these lumenal vesicles function to process nutrients and protect against bacterial infection.

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