Abstract
The protein-DNA crosslinking capability of cis-dichloro diammineplatinum has been exploited to check the intranuclear location of N-glycosylated proteins. When intact liver cells were treated with this reagent, a number of glycoproteins, recognized by Concanavalin A, have been shown to become crosslinked to DNA; many of them have been recognized as nuclear matrix components. The recognition by this lectin was abolished by treatment with N-glycosidase F, showing the presence of N-glycosidic bonds between the sugar moiety and the protein. Most of the glycoproteins appeared to have high mannose oligosaccharide chains, but sialic acid containing oligosaccharides were also identified.
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