Confronted with problems in life, it’s useful to think in terms of trends. Whether I am a consumer strapped with paying off credit card debit or a Darwinian biologist strapped with trying to explain the origin and development of life, is a given problem’s power to bedevil me getting, on the whole, bigger or smaller? If smaller, then that’s a cause for relief. Evolutionists talk grandly, seeking to give the impression that their problem is increasingly in hand, or in the bag, or under control, whichever metaphor you prefer. But this is mostly bluff, as a report in Nature Structural and Molecular Biology reminds us.
If the evolutionary origin of DNA coding remains an enigma, try adding to that the origin of histone coding that’s associated with it. A group of researchers from Emory University School of Medicine have revealed ways that histones receive modifications in such a way as to convey information that in turn allows the information in DNA to be properly read.
When things like cells and the proteins that make them go were understood to be simple blob- or crystal-like entities, then explaining how their structure could be accounted for in terms of natural selection seemed a task that was not far out of reach. On the contrary, it appeared to be intuitively easy to imagine how a full and satisfying account could be detailed.
Histones are proteins that form the nucleosome spools on which DNA is coiled tightly to fit the stuff into the minute confines of the cell. Steve Meyer observes in Signature in the Cell, “[I]t is the specific shape of the histone proteins that enables them to do their job….Thanks in part to nucleosome spooling, the information storage density of DNA is many times that of our most advanced silicon chips.”
Read More ›