The link to Alaska Statutes provided is out of date. Since the passage of the so-called "Stand Your Ground" law a couple years back there is no longer a duty to retreat assuming all the other criteria for a justified use of force have been met. It added a 5th exception:

(5) in any other place where the person has a right to be.

To look at current Alaska law it is best to go to the AK Legislature's BASIS page.

http://www.legis.state.ak.us/basis/statutes.asp#11.81.335