The ALK4 ELISA kits listed below are analytical tools for measuring concentrations of ALK4 in various samples. ALK4 is an alternative name for the human ACVR1B gene, which encodes the protein, activin A receptor type 1B. It has been mentioned that ALK4 plays a role in the apoptotic pathway and hair follicle development, among other functions. Structurally, the ACVR1B protein is 505 amino acid residues in length and 56.8 kilodaltons in mass. However, as many as 5 protein isoforms have been identified. It is localized to the cell membrane of the cell. In terms of tissue specificity, it is reported to be expressed in many tissues, most strongly in kidney, pancreas, brain, lung, and liver. This protein is known to be glycosylated, ubiquitinated and phosphorylated. Other names for this target antigen include ACTRIB, ACTRIB, and ACVRLK4. Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.