AlanFung:Protocol/OliGreen ssDNA Stain

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Probe Preparation

Samples & Materials

  • Quant-iT OliGreen ss DNA Assay Kit (Cat. no. O11492)
*Quant-iT OliGreen ss DNA Reagent (Component A), solution indimethylsulfoxide (DMSO)
*20X TE Buffer (Component B)
*Oligonucleotide Standard (Component C) 18-base M13 sequence primer, 
 with the sequence 5'-TGTAAAACGACGGCCAGT-3'
  • Sterile, distilled, DNase-free water

Overview

Procedures

Step 1: Preparing Working Reagent

*First Time
  • Allow the reagent to warm to RT before opening the vial
  • Aliquot reagent dye to 0.5mLtubes (2.2uL each tube) - Stor at -20C
*First Time
  • Dilute 20X TE buffer to 1X working solution
*Take 1mL 20X TE buffer and dilute it with 19mL DNase-free water
  • Determine the volume of Working Reagent Required
(# standards (5) + # samples) x (replicates (2)) x (volume per well (100 μL))
One tube of aliquot gives you 440uL of OliGreen dye

Step 2: Prepare Oligonucleotide Standard

  • Dilute the oligonucleotide standard provided(100ug/mL) to 100ng/mL with 1XTE buffer

File:OliGreen Standard.jpg

Step 3: Prepare Sample

  • Dilute sample to range of 50pg/mL to 50ng/mL
  • Typical probes concentration ranges from 4-20ng/uL
  • Perform a dilute according to the Table

Step 4: Prepare OliGreen Reagent

  • Prepare an aqueous working solution of the Quant-iT OliGreen reagent by making a 200 fold dilution of the concentrated DMSO solution in 1XTE Buffer
  • Add 437.8uL of 1X TE Buffer to the 2.2uL dye aliquot

Step 3: Sample Anaylysis

  • Dilute your sample solution in TE to a final volume of 1mL
  • Add 200uL of the aqueous working solution of the Quant-T OliGreen reagent to each sample
  • Incubate for 5 mins at room temperature, protected from light
  • Measure the fluorescence of the sample
  • Subtract the fluorescence value of the reagent blank from that of each of the samples
  • Determine the oligonucleotide concentration of the sample from the standard curve generated in Oligonucleotide Standard Curve