Anti-PTB3 antibodies enable researchers to detect and measure the PTB3 antigen in biological samples. This target is a reported synonym of the PTBP1 gene, which encodes polypyrimidine tract binding protein 1. This protein is known to function in mRNA processing and the regulation of cell differentiation, among other biological roles. The human version of PTB3 has a canonical amino acid length of 557 residues and a protein mass of 59.6 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the nucleus of cells and widely expressed in many tissue types. Other names for this target antigen include HNRNP-I, HNRNPI, and HNRPI. Western Blot is the most common application for the PTB3 antibodies listed below. ELISA and Immunohistochemistry are also common applications.