The transgene construct contains the entire 1.8 kb human COX-2 (PTGS2; prostaglandin-endoperoxide synthase 2 or PGE2) open reading frame sequence inserted into the 8.2 kb Thy-1 expression cassette. This construct was injected into the male pronuclei of C57BL/6J cells. No founder lines were provided in the original reference but lines 300, 303, and 316 were characterized in subsequent publications. (J:72034)