1. Vaitukaitis, J.L., G.T. Ross, G.D. Braunstein, and P.L. Rayford (1976) Gonadotropins and their subunits: Basic and clinical studies. Recent Prog. Hormone Res. 32:289–331.
2. Bahl, O.P., R.B. Carlsen, R. Bellisario, and N. Swaminathan (1972) Human chorionic gonadotropin: Amino acid sequence of the α and β subunits. Biochem. Biophys. Res. Comm. 48:416–422.
3. Morgan, F.J., S. Birken, and R.E. Canfield (1975) The amino acid sequence of human chorionic gonadotropin: The α subunit and β subunit. J. Biol. Chem. 250:5247–5258.
4. Braunstein, G.D., J. Rasor, and M.E. Wade (1975) Presence in normal human testes of a chorionic gonadotropin-like substance distinct from human luteinizing hormone. New Eng. J. Med. 292:1339–1343.
5. Chen, H.C., G.D. Hodgen, B. Matsuura, J.L. Lin, E. Gross, L.E. Reichert, S. Birken, R.E. Canfield, and G.T. Ross (1976) Evidence for gonadotropin from non-pregnant subjects that has physical, immunologic, and biologic similarities to human chorionic gonadotropin. Proc. Natl. Acad. Sci., USA 73:2885–2889.