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Histone H2A.Bbd (Barr body-deficient) is a novel histone variant which is largely excluded from the inactive X chromosome of mammals. Discovered only 6 years ago, H2A.Bbd displays very unusual structural and functional properties, for instance, it is relatively shorter and only 48% identical compared to H2A, lacking both the typical C-terminal tail of the H2A family and the very last sequence of the...
We have isolated and characterized for the first time, the SNBPs from an organism (Neofibularia nolitangere) of the phylum Porifera (Sponges). We have shown that these proteins consist of histones which, as expected, exhibit an amino acid composition very similar to that of other eukaryotic histones. The finding of histones in the sperm of these primitive organisms provides support to the notion that...
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