1. Abbreviations used: bGH, bovine growth hormone; C-2-S, intermediate extract of bGH obtained by 2 M ammonium sulfate precipitation at pH 7.9; p-bGH, fractions of bGH obtained with ELCAM 84 apparatus; NIAMDD, National Institute of Arthritis, Metabolism and Digestive Disease; NIH-GH-b16, reference preparation from NIAMDD; SDS-PAGE, sodium dodecyl sulfate polyacrylamide gel electrophoresis; PAGIF, polyacrylamide gel isoelectric focusing; Prep-PAGE, preparative polyacrylamide gel electrophoresis.
2. Santomé, J.A., Dellacha, J.M., Paladini, A.C., Pena, C., Biscoglio, M.J., Daurat, S.T., Poskus, E., and Wolfestein, C.E.M., Eur. J. Biochem.37 (1973) 164.
3. Wallis, M., FEBS Lett.35 (1973) 11.
4. Graf, L., and Li, C.H., Biochem. biophys. Res. Commun.56 (1974) 168.
5. Ellis, S., Lorenson, M., Grindeland, R.E., and Callahan, P.X., Proc. 2nd Int. Symposium on Growth Hormone, vol. 244, p. 55. Excerpta Medica, Amsterdam 1971.