Cal was born in Portland, Ore., and arrived at Princeton in 1942, where he joined Cloister Inn, played tennis, sang in the Glee Club, and majored in chemistry.
Cal received his doctorate in biochemistry from Johns Hopkins in 1954, and after several years of postdoctoral research, joined the faculty of the University of Louisville School of Medicine. He remained there, carrying out very active research and teaching programs, until his retirement as professor emeritus of biochemistry. He was noted for his studies of the role of glutathione (GSH) as a key determinant of health and biological aging in mosquitoes, mice, and men.
Two of the major influences in Cal’s life were choral music and scouting. His wife, Helen Lew Lang, founded the Crane House of the Asia Institute in Louisville. Cal and Helen were active members of the Calvin Presbyterian Church.
Cal is survived by Helen; four children, Beverly Lang Pierce, Kathryn Lang Gustafson, David Charles Lang; and Paul Allen Lang; and six grandchildren.