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Figure 4. The level of total glutathione (tGSH) in erythrocytes was negatively related to the circulating levels of antioxidants (i.e. total antioxidant status; TAS) in control birds.. From: An Intracellular Antioxidant Determines the Expression of a Melanin-Based Signal in a Bird.
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Figure 3. The reduction in glutathione levels was translated into signal expression.. From: An Intracellular Antioxidant Determines the Expression of a Melanin-Based Signal in a Bird.
Figure 2. Effect of a glutathione inhibitor on the antioxidant machinery of great tits.. From: An Intracellular Antioxidant Determines the Expression of a Melanin-Based Signal in a Bird.
Figure 1. Hypothesized mechanism at the basis of the cost of melanin-based signals.. From: An Intracellular Antioxidant Determines the Expression of a Melanin-Based Signal in a Bird.
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