John N. Anderson

Dr. John N. Anderson, longtime Purdue University professor, scientist, teacher, musician, and unapologetic absent-minded professor, died on August 18, 2026, at the age of 79.

John spent more than four decades at Purdue University, where he was a professor of biological sciences and later Professor Emeritus. His career as a scientist took an unusual path. He was at one point a college dropout, later became a Stanford graduate, and ultimately built an internationally recognized research and teaching career.

His scientific work centered on molecular biology, chromatin structure, steroid hormone action, estrogen receptors, DNA structure, and gene regulation. His research explored some of the fundamental ways DNA is organized and controlled within cells, including the relationships among DNA, nucleosomes, chromatin proteins, methylation, and hormone-responsive genes. His work also extended into research involving the HIV genome and the interaction of drugs with DNA.

But John was every bit as much a teacher as he was a researcher. He had a particular gift for turning biology from something students read about into something they could actually investigate. He developed laboratory-based experiments and educational materials that allowed students to perform real scientific experiments rather than simply memorize the conclusions of others.

In 1986, John founded Modern Biology Inc. to bring safe, authentic, and affordable laboratory experiments into college classrooms. He adapted research techniques to eliminate toxic and carcinogenic substances while giving students the opportunity to perform real science rather than simulations. His experiments have since been used by millions of students and are still being used in classrooms today.

There are distinguished scientists with impressive résumés, and then there was John. He took genuine pride in marching to his own drum.

Long before becoming a Purdue professor, John played lead guitar in a Pittsburgh wedding band. At one point, after seeing a man playing guitar on a street corner for change—someone John freely admitted was “much better than he could have ever been”—he decided he had better get his act together and give college another try. That decision took him to Slippery Rock University, where he met one of the most important people in his early life, Professor Gilbert Dryden. Dryden did more than teach him. He excited and encouraged John’s curiosity, recognized his potential, and supported him as he began finding his path in science.

That path would eventually lead through Purdue and Stanford Universities and, later, back to Purdue as a professor, researcher, and—as his son Jeffery liked to describe him with considerable accuracy—“the world’s foremost expert in the rat uterus.”

John would have appreciated the absurdity of having both of those accomplishments in the same obituary. John was the classic absent-minded professor—and was proud of it. Organization was not among the biological processes he devoted much research to. What mattered to him was curiosity.

John was remarkably indifferent to social status, appearances, and many of the conventions other people spend their lives worrying about. He was interested in whether an idea was good, whether something was true, whether an experiment worked, and whether there was something interesting left to discover.

Titles impressed him far less than intelligence, curiosity, kindness, or an interesting conversation. For a man who was not naturally expressive with his emotions, one childhood memory could bring tears to his eyes throughout his life.

As a small boy in Pittsburgh, John went into a store hoping to buy his mother a birthday present. When he reached the counter, he discovered he did not have enough money. The clerk quietly supplied the change he was missing so that he could buy the gift.

Decades later, simply telling that story could still make him tear up. It was a tiny act of kindness that he never forgot.

That story revealed something important about John. Beneath the scientist, the professor, the intellectual independence, and occasionally formidable stubbornness was someone who understood that a seemingly insignificant kindness could remain with another person for an entire lifetime.

John lived on his own terms.

He could be unconventional, fiercely independent, maddeningly disorganized, intellectually curious, funny, stubborn, brilliant, and completely uninterested in pretending to be something he wasn’t. He was a scientist who played guitar. A college dropout who graduated from Stanford. A researcher who became a full professor at Purdue. A man capable of discussing molecular biology at an extraordinary level who could simultaneously misplace an object sitting directly in front of him. And through his research and teaching, his influence reached people he would never meet.

John is survived by his son, Jeffery John Anderson, and Jeff’s wife, Gretchen; his former wife, Martha Johnson, who remained very important to him; and his two grandchildren, Adam and Aaron.

John did not want a traditional funeral. His ashes will be buried at Spring Vale Cemetery in Lafayette, Indiana, and scattered from the Grandview Overlook in Pittsburgh, near his childhood home.

He did, however, want his place in the world marked and remembered.

Perhaps the best way to remember John is through an idea particularly fitting for a man who spent his life asking questions about how living things work:

A song isn’t meaningless because it ends.

John’s song was unusual, complicated, occasionally out of tune, frequently played according to his own arrangement—and unquestionably his.

And it mattered.