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DNA

Discussion of all aspects of biological molecules, biochemical processes and laboratory procedures in the field.

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DNA

Postby anwar » Tue Mar 22, 2005 7:45 am

Would some body like 2 tell me about the difference in Spacer,Junk and setallite DNA :?:
How does interons satteled in the Eukaryotics genomes :?:
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Postby biostudent84 » Tue Jun 14, 2005 1:43 am

Junk DNA is DNA that doesn't code for anything that's used in the body.
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Postby b_d_41501 » Tue Jun 14, 2005 3:18 pm

Spacer DNA is there the spread out the DNA fragments that actually code for "things". Here's a nice link with nice pictures to explain the integration of introns in eukaryotic genomes: http://gogarten.uconn.edu/mcb221/class21.html
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Postby thank.darwin » Tue Jun 14, 2005 10:26 pm

biostudent84 wrote:Junk DNA is DNA that doesn't code for anything that's used in the body.


Well we don't know if it is "junk" or not... it might serve some genetic purpose
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Postby mith » Tue Jun 14, 2005 10:40 pm

From what my bio book says, satellite dna seems to be repeated fragments towards the ends of chromosomes. An associated disease is the fragile X syndrome where the ends are repeated excessively(200+ iterations).
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Postby b_d_41501 » Tue Jun 14, 2005 10:45 pm

I've also read that it is present to serve as large targets for mutations to reduce the chance of "coding DNA" being affected by mutations.
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