Anti-5-HT4 antibodies enable researchers to detect and measure the 5-HT4 antigen in biological samples. This target is a reported synonym of the HTR4 gene, which encodes 5-hydroxytryptamine receptor 4. This protein is known to function in chemical synaptic transmission and GPCR signaling pathways, among other biological roles. The human version of 5-HT4 has a canonical amino acid length of 388 residues and a protein mass of 43.8 kilodaltons, although 9 isoforms have been identified. It is reported to be localized in the cell membrane of cells and notably expressed in the small intestine, rectum, duodenum, colon, and appendix. Other names for this target antigen include 5-HT4R and 5-hydroxytryptamine (serotonin) receptor 4, G protein-coupled. Western Blot is the most common application for the 5-HT4 antibodies listed below. ELISA and Immunofluorescence are also common applications.