Figure 1: Affinity labeling of SDT with 50 uM of RTI-38 using UV or X-ray. Irreversible and specific binding of RTI-38 to SDT is noted with 90 cGy of X-ray or with UV ( , ). t-tests and one-way ANOVA indicate statistically significant difference from the control group ( , ) or the cocaine group treated with X-ray ( , ).