Provided below are ELISA kits targeting protein phosphatase 1 regulatory subunit 13B, a human protein encoded by PPP1R13B. This protein is 1090 amino acids long, with a mass of 119.6 kDa, and is a member of the ASPP family. This is reported to be a cytoplasmic and nuclear protein. Other alias names for this protein include: apoptosis-stimulating of p53 protein 1, apoptosis-stimulating protein of p53 1, protein phosphatase 1 regulatory (inhibitor) subunit 13B, ASPP1, and apoptosis-stimulating protein of p53 1.