Primate-specific plasma protein associated with apolipoprotein L-I (apoL-I)-containing high-density lipoprotein (HDL). Binds hemoglobin with high affinity and may contribute to the clearance of cell-free hemoglobin to allow hepatic recycling of heme iron.
Subcellular locations: Secreted
Secreted into blood plasma and associated with subtypes of high density lipoproteins (HDL).