25NL - AK on monotone board... warning: noob to cash

[shakyamuni]

Before you read this, take note - I'm an sng player, getting into cash, I probably have less than 20k hands under my belt at 10NL - so things might take a bit more explaining for me...

Villain open raises more than 1/3 of the time he gets the chance from any position... (no PAHUD, on a mac [img]/images/graemlins/frown.gif[/img] )

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
9 players
Converter

Stack sizes:
UTG: $25.25
UTG+1: $51.15
MP1: $24.75
MP2: $18.65
MP3: $12.35
Hero: $29.45
Button: $23.75
SB: $21.50
BB: $23.65

Pre-flop: (9 players) Hero is CO with A[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/club.gif[/img]
UTG folds, <font color="#cc0000">UTG+1 raises to $0.5</font>, MP1 folds, MP2 calls, MP3 folds, <font color="#cc0000">Hero raises to $2</font>, 3 folds, UTG+1 calls, MP2 folds.

Flop: T[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/heart.gif[/img] ($4.85, 2 players)
<font color="#cc0000">UTG+1 bets $2.25</font>, hero?

Whats the standard line here?