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Abelson murine leukemia virus P120: identification and characterization of tyrosine phosphorylation sites.
Authors:F H Reynolds   Jr   S Oroszlan     J R Stephenson
Abstract:Tryptic peptides containing two major in vivo P120gag-abl tyrosine phosphorylation acceptor sites were identified, phosphorylated in vitro, and purified to homogeneity. The tyrosine site in peptide a is localized at a position six residues distal to its trypsin cleavage site, whereas the tyrosine acceptor site in peptide b is at residue seven. A third peptide, c, contains an amino-terminal phosphotyrosine residue: phosphorylation of this latter peptide only occurs to a significant extent in vivo.
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