Fig. 2From: Natural diversity of lactococci in γ-aminobutyric acid (GABA) production and genetic and phenotypic determinantsPhylogenetic tree based on GAD system gene sequences. The tree was generated with the software MEGAX using the maximum likelihood method and the Tamura 3-parameter model with 1,000 bootstraps. The numbers at the branches indicate supporting bootstrap values. The scale bar indicates 0.01 substitution per nucleotide positionBack to article page