Journal: PLoS ONE
Article Title: Small RNA Library Preparation Method for Next-Generation Sequencing Using Chemical Modifications to Prevent Adapter Dimer Formation
Figure Lengend Snippet: Optimization of the 3´ adapter ligation step. Synthetic Let-7d-5p (NNN) miRNA was ligated to the 3´ adapter using the same ligation conditions as the CleanTag library prep workflow step 1. A) Yield increase with addition of PEG 8000 using T4 RNA Ligase 2, truncated KQ and modified 3´ adapter (MP (n-1)). B) Specificity comparison between ligases used in 3´ ligation step: 1) T4 RNA Ligase 2, truncated; 2) T4 RNA Ligase 2, truncated KQ; 3) T4 RNA Ligase 1; 4) No Ligase. Both unmodified and modified (MP (n-1)) 3´ adapters were tested. Side products indicated with red arrows.
Article Snippet: Ligation Step 1: 1X Buffer 1 (50 mM Tris(hydroxymethyl)aminomethane HCl pH 7.5, 10 mM MgCl2 , 1 mM dithiothreital, ~20% polyethylene glycol (PEG) 8000) (TriLink Biotechnologies), 0.5 μM CleanTag 3΄ Adapter (TriLink Biotechnologies, LLC.), 40 Units murine RNase Inhibitor (New England Biolabs), 200 Units of T4 RNA Ligase 2 truncated KQ (New England Biolabs), RNA input (1 μg), 10 μL total volume.
Techniques: Ligation, Modification