Actin Confusion

[zmike]

My textbook says that actin grows from the + end BUT
shows a diagram where it's associating and dissocating AT BOTH ends and says that how treadmilling works. help?

Does an actin-ATP recruit more actin? or does it just bind more strongly to ADP actin?

How do you determine the direction of direction of treadmilling?

thanks

[Kalirren]

Perhaps this website might help you?

http://www.rpi.edu/dept/bcbp/molbiochem/MBWeb/mb2/part1/actin.htm