Two isoforms of prostaglandin EP3 receptor exhibiting constitutive activity and agonist-dependent activity in Rho-mediated stress fiber formation Hasegawa, H.; Negishi, M.; Katoh, H.; Ichikawa, A. Biochemical and Biophysical Research Communications 234(3): 631-636 1997 0006-291X 10.1006/bbrc.1997.6655 https://eurekamag.com/research/009/684/009684085.php