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. Author manuscript; available in PMC: 2017 Mar 15.
Published in final edited form as: Environ Sci Technol. 2016 Mar 3;50(6):3256–3264. doi: 10.1021/acs.est.5b06044

Figure 2.

Figure 2

Nematode growth difference (average % of control ± SE) from expected growth under additive conditions for all selenium and mercury coexposures. Coexposures include: (A) selenate and HgCl2, (B) selenate and MeHg, (C) selenite and HgCl2, (D) selenite and MeHg, (E) selenomethionine and HgCl2, and (F) selenomethionine and MeHg. The x-axis has categorically increasing selenium exposures (µM). HgCl2 and MeHg exposures are plotted separately and are indicated by open and closed circles, respectively. Exposure concentration is represented by a solid line for 2 µM exposures and a dashed line for 5 µM exposures. Positive percentages indicate an antagonistic interaction (more growth than expected) and negative percentages greater than additive interactions (less growth than expected). Asterisks indicate significance compared to the expected additive relationship (p < 0.05).