John L. Tymoczko 1948–2019 Northfield—John L. Tymoczko, Towsley Professor of Biology, Emeritus, age 70, of Northfield, passed away of a heart attack Sunday, May 26, 2019. John was born June 18, 1948, in New Kensington, Pennsylvania, the son of Andrew and Julia (Sowal) Tymoczko. He attended high school in Arnold, Pennsylvania, graduating in 1966. In 1970, he received his Bachelor's degree and in 1973, his PhD in Biochemistry, both from the University of Chicago. In 1976, he began a 39 year career in the Biology Department at Carleton College. He was united in marriage to Alison Unger on March 21, 1992 in St. Paul. The couple made their home in Northfield. John enjoyed exercising, bike riding, photography, art and music. He loved spending time with Alison at their second home in Puerto Morelos, Mexico. He was an avid reader and author, and he treasured time with friends. He is survived by his wife Alison of Northfield; a daughter Janina Rose (J. Alex) Patterson of Portland, OR; a son Nicholas Andrew Tymoczko of New York, NY; and three grandchildren Teddy, Andrew, and Isla Patterson. He was preceded in death by his parents, and two brothers, Andrew and Dennis. A celebration of John's life will be held at the Great Hall on the Campus of Carleton College on Saturday, June 1, 2019, beginning at 2 PM. Memorials are preferred to the John Tymoczko Scholarship Fund, c/o Development Office, 200 Division Street, Northfield, MN. 55057. Arrangements by Bierman Funeral Home and Crematory. biermanfuneralhome.com.