Yellow fluorescent protein

Okay kiddo, so you know how some animals, like fireflies, can glow in the dark? Well, scientists have found a special protein that can do the same thing but in a really cool color: yellow!

This protein is called yellow fluorescent protein (YFP for short) and it comes from a type of jellyfish that lives in the ocean. Scientists can use this protein to help them see cells and molecules inside living things.

You see, cells and molecules are really tiny and hard to see with our eyes. But when scientists put YFP inside these things, they can shine a special light on them and they will glow yellow! This helps scientists to study cells and molecules and learn more about how they work.

Some scientists even use YFP to create special glowing animals! They can put the protein inside the animal's DNA and then the animal will be able to glow yellow all on its own. How cool is that?

And that's what yellow fluorescent protein is, a special protein that can help scientists study cells and molecules and can even make animals glow yellow!