<prompt> Coenzyme not required in formation of glutamate-Thiamine pyrophosphatePyridoxial phosphateNiacinNone of the above  <response>: NAD is derived from nicotinic acid, a member of the vitamin B complex, used in the synthesis of GABA. During transamination reaction glutamate is formed. Pyridoxal Phosphate acts as a coenzyme. REF: Lippincott book of biochemistry 6th ed. 