electrophoresis under nonreducing conditions yielded multiple forms of the proteins which could be discriminated by small but readily observable , reproducible differences in their migration rates in the gel . the multiplicity of the protein forms was caused by the formation of intramolecular disulfide bonds in matrix and nucleoproteins that arose during or after solubilization in sodium dodecyl sulfate .
C0033684
protein
C0028612
nucleoproteins