Junk dna's pure existence indicate that even after like 75 million (for example in mice) of evolution, that data didn't get lost, so it must be vital. So yes I might be wrong about wether or not it has a purpose indeed, but it's not giving a frame or making dna translation safe because it slows it down. There are marker parts for that, 'start' and 'stop' codons. And maybe some unknown other markers.

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We know this because ever since rodents, humans, chickens and fish shared an ancestor - about 400 million years ago - these sequences have resisted change. This strongly suggests that any alteration would have damaged the animals' ability to survive.

"These initial findings tell us quite a lot of the genome was doing something important other than coding for proteins," Professor Haussler said.

He thinks the most likely scenario is that they control the activity of indispensable genes and embryo development.

Nearly a quarter of the sequences overlap with genes and may help slice RNA - the chemical cousin of DNA involved in protein production - into different forms, Professor Haussler believes.

The conserved elements that do not actually overlap with genes tend to cluster next to genes that play a role in embryonic development.

"The fact that the conserved elements are hanging around the most important development genes, suggests they have some role in regulating the process of development and differentiation," said Professor Haussler.

Rethinking "junk" DNA

The next step is to pin down a conclusive function for these chunks of genetic material.

One method could be to produce genetically engineered mice that have bits of the sequences "knocked out". By comparing their development with that of normal mice, scientists might be able to work out the DNA's purpose.

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You've meant this? This doesn't conflict with evolution at all, it's rather supportive imho.

Cheers