Endogenous retroviruses (ERVs) are some of the most cited evidences for evolution. They are part of the suite of ‘junk DNA’ that supposedly comprised the vast majority of our DNA. ERVs are said to be parasitic retroviral DNA sequences that infected our genome long ago and have stayed there ever since. These short DNA strands are found throughout the human genome, and make up about 5% of the DNA,1 or about 10% of the total amount of DNA that is classified as transposable elements (i.e. 50%).2
However, the term ‘endogenous retrovirus’ is a bit of a misnomer. There are numerous instances where small transposable elements thought to be endogenous retroviruses have been found to have functions, which invalidates the ‘random retrovirus insertion’ claim. For instance, studies of embryo development in mice suggest that transposable elements (of which ERVs are a subset) control embryo development. Transposable elements seem to be involved in controlling the sequence and level of gene expression during development, by moving to/from the sites of gene control.3
Moreover, researchers have recently identified an important function for a large proportion of the human genome that has been labelled as ERVs. They act as promoters, starting transcription at alternative starting points, which enables different RNA transcripts to be formed from the same DNA sequence.
‘We report the existence of 51,197 ERV-derived promoter sequences that initiate transcription within the human genome, including 1,743 cases where transcription is initiated from ERV sequences that are located in gene proximal promoter or 5’ untranslated regions (UTRs).’4
And,
‘Our analysis revealed that retroviral sequences in the human genome encode tens-of-thousands of active promoters; transcribed ERV sequences correspond to 1.16% of the human genome sequence and PET tags that capture transcripts initiated from ERVs cover 22.4% of the genome.’5
Moreover, researchers have recently identified an important function for a large proportion of the human genome that has been labelled as ERVs.
So we’re not just talking about a small scale phenomenon. These ERVs aid transcription in over one fifth of the human genome! ‘These data illustrate the potential of retroviral sequences to regulate human transcription on a large scale consistent with a substantial effect of ERVs on the function and evolution of the human genome.’3 This again debunks the idea that 98% of the human genome is junk, and it makes the inserted evolutionary spin look like a tacked-on nod to the evolutionary establishment. These results support the conclusions of the ENCODE project, which found that at least 93% of DNA was transcribed into RNA."
woops- forgot link again: http://creation.com/large-scale-function-for-endogenous-retroviruses
“Thus, ‘retroviruses are ‘proof’ for common descent”
Not hardly! Claiming that is nothign more than a statement of faith! NOT Science! ‘retroviruses’ are infact NOT junk DNA as claimed by macroevolutionists, and since these passed along viruses DO have function, and are vital to life, and deevelopment, they could NOT have occured in a stepwise fashion and infact evidence shows they did NOT evolve- nor did they ‘adapt’ in a stepwise fashion to the point where they were essential for life- but macroevolutionsits can’t escape this fact, and thus stick to their disproven ‘junk DNA’ claims regardless of whether hte evidence proves otherwise