A protein has a molecular mass of 400 kDa when measured by gel filtration. When subjected to SDS-PAGE in the absence of dithiothreitol (DTT), the protein gives three bands with Mr values of 180,000, 160,000 and 60,000. When SDS-PAGE is performed in the presence of DTT, three bands are again formed, this time with Mr values of 160,000, 90,000 and 60,000. What is the simplest explanation for these results?
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Home » Biology » A protein has a molecular mass of 400 kDa when measured by gel filtration. When subjected to SDS-PAGE in the absence of dithiothreitol (DTT), the protein gives three bands with Mr values of 180,000, 160,000 and 60,000.