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Figure 4 | BMC Biotechnology

Figure 4

From: T4 RNA Ligase 2 truncated active site mutants: improved tools for RNA analysis

Figure 4

Effect of pH on ligase intermolecular strand-joining activity. (A-D) Intermolecular strand-joining reactions were carried out with 10 pmol 5'-adenylated 17mer DNA, 5 pmol 31-mer 5'-FAM-labeled RNA acceptor, and ligase (1 pmol) for 1 hour at 25°C to assess the effect of pH on ligation efficiency. Ligation efficiency was determined by resolving the material in the reactions on denaturing 15% acrylamide gels and quantifying the amount of ligation product versus input nucleic acid. (E-H) Intermolecular strand-joining reactions were carried out with 10 pmol 5'-adenylated 17-mer DNA, 5 pmol 31-mer 5'-FAM-labeled RNA acceptor, and ligase (13.8 pmol) for 1 hour at 25°C to assess the effect of pH on ligation efficiency. Rnl2tr = T4 RNA ligase 2 truncated, Rnl2tr + MBP = T4 RNA ligase 2 truncated attached to an N-terminal maltose binding protein tag. All mutations indicated are substitutions in T4 Rnl2tr + MBP. Data are shown as the mean +/- SEM of at least three independent experiments.

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