Evidence for the overestimation of molecular masses of proteins after chemical modification and chemical crosslinks on sodium dodecyl sulfate/polyacrylamide gel electrophoresis (SDS-PAGE).
Human trypsin inhibitor (home prepared), lactalbumin, trypsinogen, carbonic anhydrase, and bovine serum albumin were submitted to succinylation and their molecular masses were determined by SDS-PAGE according to the method of Weber and Osborn (1969 J. Biol. Chem. 244, 4406) before and after chemical modification. High estimates of their molecular masses were obtained. The monomer and dimer of arrowhead inhibitor proteinase-B (Chinese vegetable legume) obtained after chemical crosslink(s) were also submitted to SDS-PAGE and their apparent molecular masses were also determined and compared to the native arrowhead inhibitor proteinase-B. Abnormally high estimates of their molecular masses were obtained. Our results agree with those in the literature.
Richard
C
C
L'Unité N. 16 de l'INSERM, Faculté de Médicine, Lille, France.
Han
K K
KK
Yang
H L
HL
Zhu
D X
DX
Balduyck
M
M
Mizon
J
J
D002250:Carbon Radioisotopes; D003432:Cross-Linking Reagents; D004591:Electrophoresis, Polyacrylamide Gel / Q000379:methods; D007202:Indicators and Reagents; D008970:Molecular Weight; D011506:Proteins; D012967:Sodium Dodecyl Sulfate; D013387:Succinic Anhydrides
D002250:Carbon Radioisotopes; D003432:Cross-Linking Reagents; D007202:Indicators and Reagents; D011506:Proteins; D013387:Succinic Anhydrides; D012967:Sodium Dodecyl Sulfate; C031801:succinic anhydride