Promoter fine tuning
Optimize gene expression by fusion of a synthetic promoter library (SPL) to the gene of interest.

Analysis of the activity of pgi-lacZ under control of a synthetic promoter library. A. Transformants appear white to dark blue in the presence of X-gal. B. Promoter activity of a subset of SPL clone. Red: native promoter. (Biotechniques, Vol 45, No 3, 2008).