using a rabbit antiserum prepared against a synthetic peptide corresponding to the last 31 amino acids of the putative protein , we show that a protein with the expected migration during sodium dodecyl sulfate gel electrophoresis can indeed be immunoprecipitated from either the culture medium of mcf-7 cells grown in the presence of labeled amino acids or the in vitro translation products of mcf-7 poly ( a ) rna enriched in ps2 mrna .
C0035668
rna
C0035696
mrna