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. 2017 Nov 20;8:1997. doi: 10.3389/fpls.2017.01997

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Copyright © 2017 Fan, Zheng, Bai, Saroussi and Grossman.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Flocculation efficiency as a function of different metal cations and their concentrations in wild-type and cell wall deficient Chlamydomonas reinhardtii strains at pH 11.5. (A) Wild-type CC1690; (B) cell wall deficient mutant sta6; (C) CC400; (D) sta6-C6. Cells were grown to stationary phase and the pH of the medium was ∼11.5. The data was analyzed for significant differences using the Student’s t-test (n = 3) (each mutant in comparison with wild-type). Asterisks indicate a significant difference from the control (wild-type) (^∗p < 0.05, ^∗∗p < 0.01).