Anti-SIM antibodies enable researchers to detect and measure the SIM antigen in biological samples. This target is a reported synonym of the SIM2 gene, which encodes SIM bHLH transcription factor 2. This protein is known to function in cell differentiation and lung development, among other biological roles. The human version of SIM has a canonical amino acid length of 667 residues and a protein mass of 73.2 kilodaltons, although 2 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 HMC13F06 and HMC29C01. Western Blot is a widely used application for the SIM antibodies listed below. In addition, ELISA is also a common application.