Figure 2

Extracted ion chromatograms of 2.5 fg, 250 ag, 25 ag of 25-d6 hydroxycholesterol chromatographed on the attoLC-MS system.

Extracted ion chromatograms of 2.5 fg, 250 ag, 25 ag of 25-d6 hydroxycholesterol chromatographed on the attoLC-MS system.