Native non‐denatured 3-18% gradient PAGE of human SAP. Lane
1, molecular weight marker proteins: 669 kD, 440 kD, 232 kD, 140 kD; lane 2, GMP human SAP
13 μg; lane 3, non‐GMP human SAP for comparison 13 μg. Human SAP is known to run as a stable decamer, mass 254,620, under
these conditions (de Beer et al.,
1982).