This antibody detects endogenous protein at a molecular weight of 48 kDa. Purity is >95% by SDS-PAGE. The KIR2 subunit family includes 2. 1, 2. 2, 2. 3 and 2. 4. Unlike G protein-coupled KIR3 subunits, KIR2. 1 requires both phosphorylation by PKA and ATP