Real hierarchical clustering (Ward linkage) computed over all media. Rows and columns are
reordered so that compositionally similar things sit together; the dendrograms show the structure.
Compound × media-group presence
Each cell is the fraction of media in a
group that contain a compound. The 60 most group-discriminating compounds are shown; both axes are clustered.
0%100% of media in groupscroll to pan · hover a cell
How to read it — dark cells mean a compound is present in nearly every medium of that group. Vertical bands reveal a database's signature: laboratory media cluster on amino acids and vitamins, food databases on sugars and lipids. The dendrograms group databases (top) and compounds (left) by how alike their profiles are.
Compound co-occurrence
How often two compounds appear together
across all media (Jaccard index). Clustered blocks are groups of compounds that tend to travel together —
mineral bases, amino-acid sets, vitamin panels, lipid fractions.
01 · always together
How to read it — the bright square blocks along the diagonal are natural compound modules that tend to be added together: the mineral base (salts + trace metals), the 20 amino acids, the B-vitamin panel, and the lipid / fatty-acid fraction. It's the recurring biochemical "recipe" structure of growth media, learned from the data alone.