The researchers also added a jellyfish gene that produces a protein that glows blue when activated.

The egg that was used had been modified to include the jellyfish gene to make cells glow under a special microscope.

Another favorite lab involves taking a jellyfish gene - provided by Science in Motion - and inserting it into E. coli bacteria.

The evidence that the jellyfish gene got into the monkey's cells is purely molecular, Dr. Schatten said.

And there is a bountiful supply of mice that, thanks to the addition of a jellyfish gene, literally glow either red or green in the dark.

To find out how C. elegans uses insulin, one of his colleagues, Sarah Pierce, has fused a jellyfish gene onto the worm's insulin gene.

The jellyfish gene is one that makes a beautiful green fluorescing protein.

The jellyfish gene was a test - it directs cells to make a protein that glows under fluorescent light, making it easy to see if the added gene is active.