| 摘要 |
<p>A novel expression cloning method is provided for the detection, identification and purification of target proteins capable of binding at least to a tryosine-phosphorylated domain of a eukaryotic tyrosine kinase using novel peptide probes comprising an amino acid sequence substantially corresponding to a portion of a tyrosine-phosphorylated domain of a tyrosine kinase. The probe has at least one phosphorlated tyrosine residue and may be detectably labeled. Also disclosed is a method for preparing the probes a method for mapping to a chormosome a gene encoding a protein capable of binding to tyrosine-phosphorylated domains of tyrosine kinases, and a method for purifiying such a protein with the probe. Non-limiting examples of novel proteins discovered using the above cloning method include GRB-1, GRB-2, GRB-3, GRB-4 and GRB-7, as well as nucleic acid encoding these proteins, and methods for detecting these proteins are also provided.</p> |
