Which of the following liver enzymes is predominantly mitochondrial
Liver enzymes location 

Ectoenzymes (Plasma membrane-bound) :- 5' nucleotidase (also called nucleotide phosphatase, NTP), Gamma-glutamyl transferase (gamma-glutamyl transpeptidase : GGT), alkaline phosphatase (ALP).
Mitochondrial:- Glutamate dehydrogenase (GDH), Aspartate aminotransferase (AST) or SGOT mitochondrial isoenzyme.
Cytosolic:- Lactate dehydrogenase (LDH), Alanine transaminase (ALT) or SGPT, SGOT (AST) cytosolic isoenzyme.

Note:- In liver, the predominant isoenzyme of SGOT (AST) is mitochondrial.
SGOT (AST)
SGPT (ALT)
GGT
5' Nucleotidase