Re: The evolution of histones and other small parts


r norman wrote:


The entire book is available free on-line at

http://www.ncbi.nlm.nih.gov/books/bv.fcgi?call=bv.View..ShowTOC&rid=mboc4.TOC&depth=2
Nice. I was actually a bit lazy though, I admit. The book I have is
actually the 2cnd Edition, opposed to the 4th edition. Same authors
and the same title but the information is arranged a little differently
as I noticed that the chapter titles were quite different.

Note: not everything in the world has a complete explanation as to how
that particular thing evolved.

Well in my mind, I would need to understand how basic processes work to
accept the theory. It really is a type of macro-evolution. How did
histones form? They would have to be very complex and very specialized
to control the folding of all that DNA. How were they naturally
selected? One peice went out and made a bond with a peice of DNA? The
others followed suit? It is very complex...it seems like one of those
irreduceably complex things. It seems that histones for a particular
organism's DNA would need to appear all at once for the overall
mediation of the sequence.


That is, the sequence for histones is conserved to a much
higher degree.
Right a high rate of what most scientists call conservation, but if you
call it conservation then you would have to admit that it was
conserved. A creationist might call it an innate built in mechanism.

However the existence of clearly related histone genes
across organisms combined with details of the pattern of change in
these genes (the "nested branching pattern") demonstrates that
histones evolved the same as any other pattern.
Can you elaborate on this "nested branching pattern" or throw up a link
please?

I don't think there is much known about the origin of histones in the
first eukaryote cells, if that is your question.

Well according to what I have read, the origins of the first eukaryotes
themselves are not too well known about.

.. Histones are not unique in cell
biology in this regard.

My theory is that if I can understand the processes at their most
fundamental level, the cellular level, then the rest of the scheme will
fall in place.

.

Relevant Pages

  • Re: The evolution of histones and other small parts
    ... I was actually a bit lazy though, I admit. ... It seems that histones for a particular ... Right a high rate of what most scientists call conservation, ... first eukaryote cells, ...
    (talk.origins)
  • Re: Histones
    ... May histones, and the way DNA is wrapped around it, not be compared ... The turning of the knob on a microscope results in a predictable ... The adjustment-knob of a microscope is a designed feature, ...
    (sci.bio.evolution)
  • Re: Article: Birds of a feather not related to each other
    ... > I think you should be careful in comparing four bases to seven histones. ... Maybe it seemed that I equate the respective roles of DNA and histones - but I don't. ... Domestic pigs will after just a few generations visibly revert to a phenotype ... Peter ...
    (sci.bio.evolution)
  • Re: The evolution of histones and other small parts
    ... It seems that histones for a particular ... Right a high rate of what most scientists call conservation, ... first eukaryote cells, ... some weak sequence homology to archeabacterial histone-like proteins, ...
    (talk.origins)
  • Re: The evolution of histones and other small parts
    ... Deadrat wrote: ... You probably know nothing about DNA or histones you simply want to ... attack my sources. ...
    (talk.origins)
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