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Fig. 3 | BMC Evolutionary Biology

Fig. 3

From: Rapid evolution of chemosensory receptor genes in a pair of sibling species of orchid bees (Apidae: Euglossini)

Fig. 3

Distribution of non-synonymous amino acid substitutions across Odorant Receptor (OR) domains. a The white bars represent the sum of all non-synonymous substitutions detected in the respective domain over all ORs. OR12, OR41 and OR45 are highlighted because they showed the most non-synonymous substitutions between E. dilemma and E. viridissima. IN: Intracellular N-terminus, TM: Transmembrane domain, EL: External loop, IL: Internal loop, EC: Extracellular C-terminus. b Predicted membrane topology for OR41. Fixed non-synonymous substitutions between E. dilemma and E. viridissima are highlighted in black

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