This is the information I got from my booking agency.
Seems pretty obvious to me that it is a Turkish Airline flight...
And yes I can see it's a codeshare flight, but when I went to the Singapore Airlines desk they told me to go back to Turkish Airlines since it was booked as flight TK9300.
[img=http://www.dumpt.com/img/files/hiu6mbz9k4w6brrb19s5_thumb.png]