Fig. 6. Role of apoptotic signaling pathways in 6-OHDA-induced germline apoptosis and the protective effect of EISO and santalol isomers. Data pooled from three independent biological experiments with appropriate replicates. Probability levels of p < 0.05 were considered as statistically significant. An asterisk (**) indicates significant difference between control and 6-OHDA treated groups. A hash (#) mark indicates significant difference between 6-OHDA treated and 6-OHDA/EISO, α- or β-santalol treated groups (** and ^#p < 0.01, ns, not significant).