Fig. 3

Extracellular amylase activities and transcript levels produced by engineering the core region (− 10 and − 35) of SPluxI. (A) Extracellular amylase activities generated by engineering the core region (− 10 and − 35) of SPluxI. Enzyme activities generated by the same type of expression strategy are represented by the same colour. Transcript levels of amyZ1 (B) and luxI (C) mediated by LuxI/R devices containing various SPluxI core region mutants. The error bars represent the standard deviation