Tendency in the starting results as captured by the different assays.

<p>Variation of the quantity (MetLuc activity) in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0078205#pone-0078205-t001" target="_blank">table 1</a> for the six systems (vectors) studied. Each color corresponds to a different assay, and the lines joining the experimental points have been added for visual comfort.