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Figure 1 | BMC Evolutionary Biology

Figure 1

From: Comprehensive analysis of MHC class II genes in teleost fish genomes reveals dispensability of the peptide-loading DM system in a large part of vertebrates

Figure 1

Divergence times for selected groups of species. Timeline in million years ago (MYA) is indicated on top. The coexistence of the different class II lineages can be traced back to the period shown by an arrowhead. TGD and SGD indicate the occurrence of teleost-specific and salmonid-specific whole genome duplication events, respectively. See Additional file 1: Figure S1 for references and additional species.

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