Figure 6. More steroid adsorption occurs at lower temperatures.
Fraction of pregnenolone or DHEA retained in Fisher microcentrifuge tubes after 1 hour incubation in D-PBS at 4°C, 22°C, and 37°C. Experiment was performed twice in triplicate and graph shows mean ± SD. For both pregnenolone and DHEA, retention at 4°C was greater than at 22°C or 37°C (p < 0.001 for all comparisons, Tukey’s multiple comparison test after one-way ANOVA).
