Table 3. Calculated Trehalose Concentrations and Percent Recoveries from Trehalose Samples Prepared in E. coli DH5α Cell Lysates or 1:1 E. coli DH5α Cell Lysates/Acetonitrile for All Three Assays.
assay | expected [trehalose] | calculated [trehalose]a | percent recovery |
---|---|---|---|
enzymatic trehalose assay | 30 μM | 29 ± 2 μM | 97 |
80 μM | 79 ± 4 μM | 99 | |
250 μM | 240 ± 20 μM | 96 | |
800 μM | 792 ± 5 μM | 99 | |
HPLC-RID | 5 mM | 4.77 ± 0.05 mM | 95 |
40 mM | 38.5 ± 0.4 mM | 96 | |
80 mM | 84.4 ± 0.7 mM | 106 | |
LC–MS/MS | 5 μM | 5.0 ± 0.2 μM | 100 |
30 μM | 28.3 ± 0.8 μM | 94 | |
80 μM | 74 ± 2 μM | 93 |
n = 3–5.