RNA quantification of samples subjected to different protocols and resuspended in TRI-reagent or RLT buffer extracted by RNeasy Mini kit (Qiagen, Hilden, Germany) or TRI-reagent (Sigma-Aldrich)

SamplesConcentration (ng/μL)Absorbance (260/280 nm)
3-step UC
        PBS + RLT (AllPrep kit)4.12.19
2.43.05
1.13.08
        TRI-reagent + PBS782.41.78
1,045.11.82
1,185.01.58
        RLT (AllPrep kit)7.73.05
        TRI-reagent1,281.91.71
WW
        TRI-reagent + PBS1,087.61.71
1,321.91.71
1,281.91.64
        PBS + RLT (AllPrep kit)1.01.62
        RLT (AllPrep kit)0.80.12
        TRI-reagent486.11.43
CDP
        RLT (3-step, AllPrep kit)13.51.45
        RLT (WW, AllPrep kit)0.63.05

CDP: contaminant-depleted plasma; PBS: phosphate buffered saline; UC: ultracentrifugation; WW: samples without washing