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Biological sciences

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Marsupial MHC class II beta genes are not orthologous to the eutherian beta gene families

Article Abstract:

A new marsupial MHC class II beta sequence is described and a thorough phylogenetic analysis of classical class II beta-chain sequences, in order to determine the gene's evolutionary origins, is conducted. It appears that the marsupial and eutherian lineages have retained different gene clusters following gene duplication events early in mammalian evolution.

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MHC DQB-I polymorphism in the Gulf of California fin whale (Balaenoptera physalus) population

Article Abstract:

A study is conducted to explore whether the most isolated populations of fin whales in the Gulf of California (GOC), displayed limited adaptive polymorphism as compared to their counterparts in North Pacific. The results showed them with low genetic variation indicating that GOC fin whales could be susceptible to infections caused by novel pathogens.

Pacific Ocean, Genetic polymorphisms, Gulf of California

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Centromere dynamics and chromosome evolution in Marsupials

Article Abstract:

Centromere emergence during karyotypic diversification and speciation is studied. The eukaryotic centromere poses an interesting evolutionary paradox that it is a chromatin entity indispensable to precise chromosome segregation in all eukaryotes, yet the DNA at the heart of the centromere is remarkably variable.

Centromeres, Karyotyping

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