First Advisor

Ronald P. Leon

Date of Award


Document Type


Degree Name

Bachelor of Science (B.S.) in Biology and University Honors




Protein-tyrosine kinase -- Research, Cancer cells -- Research, Monoclonal antibodies




Tyrosine kinase Src substrates, Tks4 and Tks5, are involved in the formation of podosomes and invadopodia during cell migration and cancer cell metastasis. Most recently, the α isoform of Tks5 has been discovered highly expressed in cancer cells, suggesting that the Tks5 α isoform plays essential roles in the regulation of invadopodia. In the Tks protein family, only the Tks5 α isoform contains a PX domain, which binds an important second messenger, PI (3,4) P2. Using a monoclonal antibody as an antigen-specific-probe to detect the protein of interest could be a useful tool that would provide a highly specific recognition at the molecular level. This project aims to develop a highly specific rabbit monoclonal antibody (mAb) to target the human Tks5 α isoform (specifically the PX domain) in cancer cells. In this study we describe the first step of the entire process, immunogen preparation. The results showed that the recombinant protein, hTks5 α PX domain, was successfully expressed in BL21 E.coli competent cells and the purified antibody has high immunoreactivity. Other promising results obtained from western blot and immunofluorescence analyses indicated the developing antibody samples have high targeting effects on human Tks5 α isoform PX domain.


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