g ---> ğ  alteration

The "ğ" alteration is seen in some multisyllabic "g "ending words as well.

Psikolog  becomes  Psikoloğu 

Nörolog  becomes Nöroloğu 

Katalog  becomes  Kataloğu 

with accusative case.

Note that it is NOT seen in all g-ending multisyllabic words. It is not seen in monosyllabic g-ending words either.

Example for Multısyllabıc non-alternating word ;

Miting ----> Mitingi