Mason Posner teaches anatomy and physiology, marine and vertebrate biology at Ashland University in Ohio. He does research on the evolution and function of the vertebrate eye lens and has interests in undergraduate research and teaching technology. He leads a science communication capstone courses that teaches Biology majors how to develop science blogs
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How to give a mouse a heart attack

Actually not easy to do.  Those little guys do not normally have elevated cholesterol levels and their arteries stay unclogged.  But with a little genetic engineering you can knockout the gene for the protein apolipoprotein E, which plays a role in clearing bad cholesterol – LDL – from the blood.  The result is high levels [...]

What do we know about RNA and DNA?

Turns out we have a lot more to find out.  This whole DNA/RNA thing was not wrapped up in the 1950s.

Two recent articles in the NY Times summarize some of the latest work on these two nucleic acids, and show that they are more impressive than we thought.  RNA interference was discovered only about 10 [...]