These APRO6 ELISA kits are immunodetection tools for measuring the levels of APRO6 in biological samples. APRO6 is an alias name of the human TOB1 gene, which encodes the protein, transducer of ERBB2, 1. Notably, APRO6 is known to play a role in the regulation of cell proliferation and the regulation of cell differentiation, among other functions. The TOB1 protein is described to be 345 amino acid residues in length and 38.2 kilodaltons in mass. It is localized to the nucleus and cytoplasm of the cell. In terms of tissue specificity, it is ubiquitously expressed across many tissue types. This protein is known to be phosphorylated. Other names for this target antigen include APRO5 and PIG49.