'Cargo' Traveling Through a Neuron (video) University at Buffalo Loading video... Caption Kinesin and dynein motors carrying the Alzheimer's protein APP travel on microtubule tracks in a single axon in the nerve of a fruit fly larva. This video shows the motors' normal behavior; when the level of presenilin was reduced in a study, the motors increased their velocity. Credit Shermali Gunawardena Usage Restrictions This video may only be used in conjunction with news reports discussing the research in the associated press release. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.