Yolk proteins of Caenorhabditis elegans - PubMed (original) (raw)
Yolk proteins of Caenorhabditis elegans
W J Sharrock. Dev Biol. 1983 Mar.
Abstract
A group of proteins judged on several criteria to be yolk proteins have been isolated from a homogenate of the nematode Caenorhabditis elegans. Comparison of partial proteolysis fragments indicates that the two bands of a 170,000-dalton doublet (yp170) are closely related; bands observed at 115,000 daltons (yp115) and 88,000 daltons (yp88) appear to be structurally distinct. All three yolk protein species are glycoproteins, as judged by binding of the lectin concanavalin A. The yp170 doublet has been purified by gel filtration in the presence of sodium dodecyl sulfate. An antiserum obtained by immunization with the purified yp170 doublet does not bind either of the two smaller proteins. Staining of C. elegans eggs by indirect immunofluorescence with the anti-yp170 serum indicates a dispersed cytoplasmic location for the antigen throughout embryogenesis, with apparent segregation to the intestine immediately prior to hatching.
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