Human chorionic gonadotropin 7. preparation and immuno characteristics of carboxyl terminal peptides of the beta subunit of human chorionic gonadotropin Kawasaki, K.; Iguchi, S.; Kawasaki, C.; Maeda, M.; Okada, Y.; Yamaji, K.; Takagi, T.; Sugita, N.; Tanizawa, O. Chemical and Pharmaceutical Bulletin (Tokyo) 30(3): 1043-1047 1982 0009-2363 https://eurekamag.com/research/005/591/005591135.php