For even higher efficacies of adaptive immunity (I+{IA}), the evolutionary process gives rise to two divergent classes: hosts with adaptive immunity coexist with hosts that lack it, both exhibiting negligible suicide propensities.
The four copy types within class 1 and the four divergent classes 2 to 5 together make eight divergent copy types per species.
Our results show that the mouse Mup gene cluster is composed of two subgroups: an older, more divergent class of genes and pseudogenes, and a second class with high sequence identity formed by recent sequential duplications of a single gene/pseudogene pair.
Other exceptions include ZmIDD16 and OsIDD14, but these genes belong to the divergent class of IDD genes found in all three species (the 'A' grouping in Figure 6) and therefore it is unlikely that they share a common function.
Structures of mammalian mitoribosomes reveal details underlying the function of this divergent class of ribosome.
The remaining 23 MdIr genes were regarded as members of the divergent class of insect Irs.
In the following analyses, we focused on the two most divergent classes (HCP and LCP).
In summary, Atlantic salmon harbours at least two divergent MHC class II beta sequences (Sasa-DAB and Sasa-DBB) and four divergent MHC class II alpha sequences (Sasa-DAA, Sasa-DBA, Sasa-DCA and Sasa-DDA), which all share most of the characteristics typical for vertebrate MHC class II molecules.
Two additional divergent class II alpha sequences were also identified and represent two additional salmonid class II alpha loci.
But if you want to see these two divergent strands of contemporary American Jewry side by side you need go no further than Clifton, a middle-class community next to Passaic.
