Linear correlation between assays in the starting results.

<p>Scatter plots comparing the quantity (MetLuc activity) of the six systems (vectors) in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0078205#pone-0078205-t001" target="_blank">table 1</a> for different pairs of assays. Using blue squares, MetLuc activity in assay 2 vs. the same quantity in assay 1. Using green triangles, assay 2 vs. assay 3. The least-squares fit lines are depicted using the same color as the respective points, and we also show the line in red for reference.