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. 2016 Oct 15;219(20):3190–3203. doi: 10.1242/jeb.127134

Fig. 10.

Fig. 10.

There is no evidence for altitude-related differences in the relative abundance of HbA and HbD isoforms in Andean birds. Phylogenetically independent comparisons involving 26 pairs of high- and low-altitude taxa revealed no systematic difference in the relative expression level of the minor HbD isoform (Wilcoxon signed-ranks test, Z=−0.775, P=0.441). The diagonal represents the line of equality (x=y). Filled symbols denote comparisons between species, whereas open symbols denote comparisons between high- versus low-altitude populations of the same species. Data from Natarajan et al. (2016).