Provided below are ELISA kits targeting protein phosphatase 1 regulatory subunit 15A, a human protein encoded by PPP1R15A. This protein is 674 amino acids long, with a mass of 73.5 kDa, and is a member of the PPP1R15 family. 2 isoforms have been identified. This is reported to be a mitochondrial protein. Other alias names for this protein include: growth arrest and DNA damage-inducible protein GADD34, growth arrest and DNA-damage-inducible 34, myeloid differentiation primary response protein MyD116 homolog, and protein phosphatase 1 regulatory (inhibitor) subunit 15A.