Fluorescent Puppy is World’s First Transgenic Dog

A cloned beagle named Ruppy — short for Ruby Puppy — is the world’s first transgenic dog. She and four other beagles all produce a fluorescent protein that glows red under ultraviolet light. A team led by Byeong-Chun Lee of Seoul National University in South Korea created the dogs by cloning fibroblast cells that express a red fluorescent gene produced by sea anemones. Lee and stem cell researcher Woo Suk Hwang were part of a team that created the first cloned dog, SnuppyMovie Camera, in 2005. Much of Hwang’s work on human cells turned out to be fraudulent, but Snuppy was not, an investigation later concluded

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