Fig. 2From: Compound heterozygous inheritance of two novel COQ2 variants results in familial coenzyme Q deficiencyElectroretinography (ERG) testing. ERG testing for the youngest proband. Results shown here are representative of results obtained for all affected patients described in this report. Scotopic and photopic responses were extinguished in both eyes for all three patients, with scotopic responses being more severely affected, indicating a rod-cone dysfunctionBack to article page