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. 2014 May 1;217(9):1601–1612. doi: 10.1242/jeb.101758

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© 2014. Published by The Company of Biologists Ltd

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Fig. 1. — Principal components analysis (PCA), using expression patterns of 363 protein spots, for gill samples of 24 mussels exposed to different exposure–recovery treatments. Each symbol represents a single mussel: blue, control; green, 6 h exposure (6E)/18 h recovery (18R); yellow, 12E/12R; red, 18E/6R. (A) PC1 (horizontal axis) separates 6E/18R from other groups; PC2 (vertical axis) separates 12E/12R from 18E/6R. (B) PC3 (vertical axis) separates control mussels from 12E/12R and 18E/6R treatment groups. Percentages indicate the amount of variation in protein expression patterns among 363 protein spots described by each component.