Fig. 5
![Fig. 5](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs42523-023-00288-y/MediaObjects/42523_2023_288_Fig5_HTML.png)
Hierarchical clustering analysis for identification of different metabolites in lamb serum by comparison of the grass and concentrate groups following negative mode ionization. Each column in the figure represents a sample, each row represents a metabolite, and the color indicates the relative amount of metabolites expressed in the group; Red indicates that the metabolite is expressed at high levels, and green indicates lower expression