Fig. 4From: A high-throughput dual system to screen polyphosphate kinase mutants for efficient ATP regeneration in L-theanine biocatalysisResults of the high-throughput screening of ChPPK mutants. a Results of the extracellular screening, dark blue: positive mutants, light blue: negative mutants. b Results of the fluorescence screening, the red star mark: the wild strainBack to article page