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RE: Endogenous retroviruses - 7/22/2008 6:50:52 PM
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HHV5
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quote:
ORIGINAL: Jhud quote:
A mutation is a permanent nucleotide change in the genome. What are these "radically different things" you speak of? Well, again, that is one word to describe mutiple disparate processes, and as such, fairly useless. "Mutation" is a general term. If the occasion necessitates further explanation, then an appropriate, more descriptive term would be used.
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RE: Endogenous retroviruses - 7/22/2008 8:18:34 PM
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gluadys
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quote:
ORIGINAL: Jhud Well, that is one of my problems with the vague notion of ‘mutation’ – it can mean a number of radically different things. What radically different things? Apart from historical usages predating discovery of the DNA molecule structure, I know of only one meaning of mutation: a change in the sequence of base nucleotides. What is vague about that? quote:
An ERV doesn’t ‘re-write’ a genome, it introduces a bit of code in the genome to be replicated. I didn't say "genome". I said "sequence". And the ERV doesn't write anything. The retrovirus introduces the bit of code. The ERV is the bit of code. quote:
quote:
I think we are seeing a bit of confusion between the purpose of the infecting retrovirus and the purpose of the resulting ERV. Delivering new genetic code is indeed the purpose of the retrovirus. But creating an ERV is not. Had the program of the infecting retrovirus been carried through, the result would have been the replication of viruses and the destruction of the infected cell. So, from the perspective of the cell, the purpose of the delivery of new genetic code is indeed malicious for the purpose is to divert the cell machinery from its ordinary work to the replication of viruses. Well, first off this is of course the ordinary assumption. I would say it is observed retroviral behaviour. Do you have data to the contrary? quote:
Though it is really quite odd that an organism would evolve to kill or sicken it’s host when it could instead accomplish the same goal (replicate it’s genome) but simply inserting it into it’s hosts genome and let the host do all the work. In fact, it is generally detrimental to kill off one’s hosts, and certainly less effective. Nevertheless many infections are fatal, no matter how odd you find it. quote:
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An ERV only occurs when the retrovirus is NOT successful in carrying out its purpose of stimulating the replication of viruses. So the creation of an ERV is by its very nature, never designed. It is a testimony to thwarted design---whatever the nature of its subsequent impact on the species in which it occurs. Well, again that is the assumption. What kind of an assumption? Well-founded or weak? Incorrect, shrewd, misleading, insightful? quote:
– indeed, I believe there is some theorizing that viruses are a decayed form of bacteria. I have heard that theory too. Yet bacteria do not usually impact a cell's DNA. quote:
Of course, at least from a theological perspective, it may be that viruses are intentionally harmful, and were designed to be that way. I wonder whose theological perspective that would be. Would this imply a malevolent designer? Or could these intentionally harmful critters be part of an overall beneficial design?
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RE: Endogenous retroviruses - 7/22/2008 8:21:38 PM
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gluadys
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quote:
ORIGINAL: Jhud Incorporating means exactly what it says - utilizing extant genetic material as a basis for producing the human genome. And that raises the question of the physical location of this extant genetic material. As well as the process of how it gets from where it is to the original human population. What thoughts do you have along these lines? quote:
though to be clear, unlike other creatures, I think a human is much more than the product of a genome alone. I would agree with that.
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RE: Endogenous retroviruses - 7/22/2008 8:28:28 PM
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gluadys
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quote:
ORIGINAL: Jhud quote:
A mutation is a permanent nucleotide change in the genome. What are these "radically different things" you speak of? Well, again, that is one word to describe mutiple disparate processes, and as such, fairly useless. I still don't get where you are coming from on this. A mutation is a permanent nucleotide change in the genome. One can of course catalogue various changes into categories: point mutations, indels, transpositions, etc. Is this what you are getting at? I don't find that any more vague than using the word "tree" to refer to pines, elms, palms, cypress, cherry trees, etc. Nor do I find it at all useless.
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RE: Endogenous retroviruses - 7/23/2008 12:20:09 AM
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Method
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quote:
ORIGINAL: Jhud Incorporating means exactly what it says - utilizing extant genetic material as a basis for producing the human genome. Then what do you consider ERV's that accumulate mutations, loop out leaving LTR's, become attached to transposons (MaLR's), etc? The ERV is "pristine" for only a few generations. quote:
I don't think that this could happen apart from intelligence, though to be clear, unlike other creatures, I think a human is much more than the product of a genome alone. I'm not getting this part. Retroviruses insert themselves into the genome with no help from an intelligence. Even small bits of mitochondrial DNA find their way into our genomes with no help from any intelligence. The chemistry of DNA allows for all types of chemical reactions that result in DNA recombination.
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RE: Endogenous retroviruses - 7/23/2008 9:12:58 PM
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Jhud
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quote:
I still don't get where you are coming from on this. A mutation is a permanent nucleotide change in the genome. One can of course catalogue various changes into categories: point mutations, indels, transpositions, etc. Is this what you are getting at? I don't find that any more vague than using the word "tree" to refer to pines, elms, palms, cypress, cherry trees, etc. Nor do I find it at all useless. Actually, I think you have demonstrated exactly what I meant - if I asked you where pine cones come from and you said 'trees' I might have some idea of where to look for a pine cone, but unless there happened to be some conifers in the vicinity, I might search in vain. But I think mutation is even less specific than that, because it is an attempt to describe a process, and is equivalent to 'change'. How did that gene state producing that protein? It 'changed'! The reality is some mutations constitute the removal of information, some the duplication of information, some the rearranging of information, and some the insertion of significant portions of novel information. Equating them all under the rubric of 'mutation' is like equating writing a book with ripping out the pages of a book.
_____________________________
Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-2008
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RE: Endogenous retroviruses - 7/23/2008 9:32:04 PM
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Method
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quote:
ORIGINAL: Jhud But I think mutation is even less specific than that, because it is an attempt to describe a process, and is equivalent to 'change'. How did that gene state producing that protein? It 'changed'! "Mutation" describes a result. A heritable change. It was this way within Lamarckism. Darwin showed that these mutations were not acquired but were variations from birth. Luria, Delbruck, and the Lederbergs went even farther and showed that the process that produces mutations does not reference the environment. That is, mutations are random with respect to fitness. With all of this work already in the bag DNA was finally discovered and the chemical basis of mutations was understood. quote:
The reality is some mutations constitute the removal of information, some the duplication of information, some the rearranging of information, and some the insertion of significant portions of novel information. Equating them all under the rubric of 'mutation' is like equating writing a book with ripping out the pages of a book. Using your book analogy, mutation is equivalent to changing the text of the book with each new edition.
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RE: Endogenous retroviruses - 7/23/2008 9:54:04 PM
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Jhud
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quote:
"Mutation" describes a result. A heritable change. It was this way within Lamarckism. Darwin showed that these mutations were not acquired but were variations from birth. Luria, Delbruck, and the Lederbergs went even farther and showed that the process that produces mutations does not reference the environment. That is, mutations are random with respect to fitness. With all of this work already in the bag DNA was finally discovered and the chemical basis of mutations was understood. I fully understand where the term was derived - that doesn't change it's short comings as a description. quote:
Using your book analogy, mutation is equivalent to changing the text of the book with each new edition. Except if you changed a book by incidentally inserting, duplicating, and rearranging the words and letters, you would have nonsense.
_____________________________
Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-2008
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RE: Endogenous retroviruses - 7/23/2008 9:58:51 PM
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Method
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quote:
ORIGINAL: Jhud I fully understand where the term was derived - that doesn't change it's short comings as a description. Then give us a better word that fits the observations that I listed before. Science, like any other profession, is loaded with jargon. When scientists speak of mutations we know what each other are talking about but it may not be obvious to the layperson. quote:
Except if you changed a book by incidentally inserting, duplicating, and rearranging the words and letters, you would have nonsense. But that is not so with DNA. All analogies have their limits.
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RE: Endogenous retroviruses - 7/23/2008 10:16:26 PM
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Jhud
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quote:
Then give us a better word that fits the observations that I listed before. Science, like any other profession, is loaded with jargon. When scientists speak of mutations we know what each other are talking about but it may not be obvious to the layperson. Again, I fully understand the 'jargon' - but the terminology is still vague, and part of the reason why many evolutionary explanations are lacking. quote:
But that is not so with DNA. All analogies have their limits. So DNA doesn't change by way of incidental insertions, duplications, and rearrangments?
_____________________________
Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-2008
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RE: Endogenous retroviruses - 7/23/2008 10:35:38 PM
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Method
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quote:
ORIGINAL: Jhud Again, I fully understand the 'jargon' - but the terminology is still vague, and part of the reason why many evolutionary explanations are lacking. Then what would be a better word? quote:
So DNA doesn't change by way of incidental insertions, duplications, and rearrangments? Incidental is too vague, so your explanation is lacking. I can do it too.
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RE: Endogenous retroviruses - 7/23/2008 10:40:13 PM
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Jhud
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quote:
Then what would be a better word? We could start by calling a deletion a deletion, an erv an erv, a duplication a duplication, etc. quote:
Incidental is too vague, so your explanation is lacking. I can do it too. Incidental means without forethought - what is vague about that?
_____________________________
Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-2008
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RE: Endogenous retroviruses - 7/23/2008 11:01:35 PM
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gluadys
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quote:
ORIGINAL: Jhud quote:
Then what would be a better word? We could start by calling a deletion a deletion, an erv an erv, a duplication a duplication, etc. And we can call a change a change. There is a reason languages develop generic terms. When specification as to what kind of change is necessary, then of course we ought to use specific terms.
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RE: Endogenous retroviruses - 7/23/2008 11:02:14 PM
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Method
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quote:
ORIGINAL: Jhud We could start by calling a deletion a deletion, an erv an erv, a duplication a duplication, etc. What would we call them as a group of DNA changes? That's quite a mouthful in order to say "how DNA changes". quote:
Incidental means without forethought - what is vague about that? Forethought is way too vague.
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RE: Endogenous retroviruses - 7/23/2008 11:04:06 PM
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Jhud
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quote:
And we can call a change a change. There is a reason languages develop generic terms. When specification as to what kind of change is necessary, then of course we ought to use specific terms. Exactly!
_____________________________
Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-2008
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RE: Endogenous retroviruses - 7/23/2008 11:05:25 PM
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Jhud
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quote:
What would we call them as a group of DNA changes? That's quite a mouthful in order to say "how DNA changes". Why would we consider them a group? quote:
Forethought is way too vague. Not if one knows the language.
_____________________________
Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-2008
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RE: Endogenous retroviruses - 7/23/2008 11:06:26 PM
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Method
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quote:
ORIGINAL: Jhud Why would we consider them a group? Because you do. You consider them as fuel for selection. quote:
Not if one knows the language. And if someone knows english they know what mutation means.
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RE: Endogenous retroviruses - 7/23/2008 11:07:11 PM
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gluadys
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quote:
ORIGINAL: Jhud quote:
And we can call a change a change. There is a reason languages develop generic terms. When specification as to what kind of change is necessary, then of course we ought to use specific terms. Exactly! Well, if you have no problem with the use of generic language, what is your problem with "mutation"? It is already more specific than "change". And it is useful when we do not need to detail what specific type of mutation occurred.
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RE: Endogenous retroviruses - 7/23/2008 11:09:18 PM
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Jhud
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quote:
Because you do. You consider them as fuel for selection. Well I consider tree limbs, uranium, and wind to be fuel as well, but I don't think they are al that similar. quote:
And if someone knows english they know what mutation means. Certainly - they will know that it means 'change' - and change isn't a mechanism.
_____________________________
Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-2008
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RE: Endogenous retroviruses - 7/23/2008 11:13:47 PM
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gluadys
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quote:
ORIGINAL: Jhud quote:
Because you do. You consider them as fuel for selection. Well I consider tree limbs, uranium, and wind to be fuel as well, but I don't think they are al that similar. But do you consider them fuel for selection? quote:
quote:
And if someone knows english they know what mutation means. Certainly - they will know that it means 'change' - and change isn't a mechanism. Is "deletion" a mechanism?
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RE: Endogenous retroviruses - 7/23/2008 11:16:39 PM
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Jhud
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quote:
But do you consider them fuel for selection? I think they are potentially fuel for selection. quote:
Is "deletion" a mechanism? Sure, it's a great way to eliminate information.
_____________________________
Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-2008
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RE: Endogenous retroviruses - 7/23/2008 11:22:11 PM
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Method
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quote:
ORIGINAL: Jhud quote:
But do you consider them fuel for selection? I think they are potentially fuel for selection. What are? quote:
quote:
Is "deletion" a mechanism? Sure, it's a great way to eliminate information. Really? A removal of DNA can not produce novel morphology or novel function?
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RE: Endogenous retroviruses - 7/23/2008 11:33:00 PM
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Method
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quote:
ORIGINAL: Jhud Insertions, deletions, duplications, and ervs. What are insertions, deletions, duplications, and erv's? quote:
Oh, it can certainly change morphology, but I don't think that it will produce a novel function without straining the meaing of that word. Could it produce an enzyme with a function not seen in the full length enzyme?
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RE: Endogenous retroviruses - 7/23/2008 11:36:37 PM
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Jhud
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quote:
What are insertions, deletions, duplications, and erv's? Wel, a deletion is the removal of genetic information, a an insertion the placing of information into a genome, a duplication is the duplication of the same and an erv is the introduction of genetic information from a virus. quote:
Could it produce an enzyme with a function not seen in the full length enzyme? I could change the ordinary function of an enzyme.
_____________________________
Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-2008
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