FIGURE 3.
Genetic basis of RP. The genetic basis of RP is supported by familial studies and twin analysis in addition to a reported case of a 1-month male baby diagnosed with the disease. Furthermore, a combination of positive genotypes for both genes encoding glutathione S-transferase M1 and T1 subtypes may have a role in susceptibility to RP. Linkage analysis pinpointed five areas corresponding to three candidate genes (β-subunit of muscle acetylcholine receptor, 1E and 1B serotonin receptors) which could be associated to RP.