IFNG and age-related macular degeneration: Untreated AMD cell lysates also showed 137.3 % higher IFN-γ protein levels compared to untreated normal cell lysates: P = 0.0381; NL UN CL = 1 ± 0.1748 a.u.; AMD UN CL = 2.373 ± 0.6844 a.u. (Figure 3J).