3.4.24.55 6.8 7.2 insulin 31309 3.4.24.55 7.5 - 4-dinitrophenyl)Lys-Leu-Asp-D-Lys 31307 3.4.24.55 8 - activity in sodium phosphate buffer is 3- to 4fold higher than in veronal or Tris/HCl buffer 667795