| Assuming your image is relatively solid I think your turn play is optimal against what is probably a pretty nitty range of underpairs and sets and the occasional Tx hand/AK float. I don't even know how the term protecting against draws can be applied to this hand at all being that it's such a dry flop.
Once again even though your hand looks like air (AK/AQ) it's pretty tough for him to be bluffing air without some really sick undercard float oop on the flop. I think he checks down nearly all 1 pair hands e.g. 99, 77, Tx on the river. That being said I think it's I fold. I probably call nearly everytime tho unless I'm playing my A game. | 
