Schalke have confirmed an agreement with Turkish outfit Besiktas over the loan transfer of forward Edu.
The Brazilian is under contract at Schalke until June 2013, but he is to spend the remainder of the current season in Turkey.
Besiktas also have the option to make the deal permanent in the future if Edu proves a successful signing.
Schalke general manager Horst Heldt told Reviersport last week: "Edu already travelled to Istanbul before the deal was completed."
On transfer deadline day, Schalke signed Finland Under 21 international Teemu Pukki from HJK Helsinki for a fee believed to be in the region of £1.3million.