AK TPTK facing heat

AKo, flopped TPTK, facing min-checkraise then a big turn lead. Standard?


Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) Full-Tilt Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Button ($14.70)
SB ($66.30)
BB ($62.30)
Hero ($50)
UTG+1 ($13.05)
MP1 ($10.40)
MP2 ($48.50)
MP3 ($37.70)
CO ($94.40)

Preflop: Hero is UTG with K, A.
Hero raises to $1.75, 6 folds, SB calls $1.50, 1 fold.

Flop: ($4) 7, 4, A (2 players)
SB checks, Hero bets $3, SB raises to $6, Hero calls $3.

Turn: ($16) 6 (2 players)
SB bets $16, Hero folds.

Final Pot: $16

2pr+ > your hand.

Know anything about him?

Sets, flushs and AQ look much more likely than 2 pair.