Figure 4.

Cluster analysis of relative protein abundances. no Zn/65 μM PO₄³⁻, Zn/65 μM PO₄³⁻, no Zn/1 μM PO₄³⁻, Zn/1 μM PO₄³⁻ and these four chronic treatments with short term 4.4 pM Cd²⁺ added. The four low PO₄³⁻ treatments are on the right and replete, and high PO₄³⁻ on the left. There are 71 proteins. Protein relative abundances are averages of duplicates, have at least 7 counts, and are different by a value of 7. Data are log transformed, centered, and clustered by Kendall's Tau, centroid linkage. Yellow, more abundant; Blue, less abundant; ^*, statistically different by Fisher's Exact Test between the no Zn/high PO₄³⁻ and the no Zn/high PO₄³⁻/short-term Cd; ^**, differentially abundant by two-fold or greater and statistically different by Fisher's Exact Test between the no Zn/high PO₄³⁻ and the no Zn/high PO₄³⁻/short-term Cd.