Fig. 7

Quantitation of neurite outgrowth length in cells treated with RA alone, or in combination with 1 mM NAC, melanin or arginine-modified melanin from D. tricolor and F. fomentarius at day 7 (A), day 12 (B), and day 14 (C). Means sharing different letters (e) were significantly different (p < 0.05, one-way ANOVA followed by Tukey’s posthoc test). RA: Retinoic acid; NAC: N-acetylcysteine; DTM: D. tricolor melanin; FFM: F. fomentarius melanin; ADTM: arginine-modified D. tricolor melanin; AFFM: arginine-modified F. fomentarius melanin