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. 2009 Jul 21;587(Pt 18):4425–4439. doi: 10.1113/jphysiol.2009.175075

Figure 4. Cluster dendrogram showing the relationships among response profiles of gustducin-expressing taste cells.

Figure 4

The cell number and response profile of each cell is indicated on the left. Capital letters indicate the stimulus producing the maximum response (shown first) and all others with responses ≥50% of maximum. Lower-case letters indicate responses <50% of the maximum. The order of the letters indicates the relative magnitude of the response to each stimulus (S or s: Sac; N or n: NaCl; H or h: HCl, Q or q: quinine, M or m: MSG). The three clusters are labelled Sac, MSG and quinine according to the best stimulus. The Sac cluster is further divided into 3 groups, sweet specific (labelled S), sweet and salty (labelled Sn), sweet and umami (Sm).