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. 2011 Jun 29;6(6):e21653. doi: 10.1371/journal.pone.0021653

Figure 2. Retinal carotenoid levels in experiment two.

Figure 2

Mean ± S.E. concentration of the six carotenoid types in retinas of female finches receiving a low-carotenoid (open bars) or zeaxanthin-supplemented (solid bars) diet in experiment two. *indicate significant treatment differences.