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Nested tD(m/z) plot for electrosprayed solutions of 0.01M (a) enantiopure (100% L) and (b) racemic (50:50 L/D) proline. The arbitrary intensity scheme represents the least intense features in navy and the most intense features in red. The collision cross section for the [14Pro+2H]2+ cluster formed from the (c) enantiopure and (d) racemic solutions differ by ~2%.
